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Sea level rise and marine erosion threaten coastal archaeological sites around the world, forcing difficult decisions about how to prioritize which sites to document and analyze. Here we present the results of research at a heavily eroded Late Holocene shell midden at CA-SRI-26, Santa Rosa Island, California. Systematic surface collection and radiocarbon dating of the site revealed an assemblage that is about 1400 years old and contains a variety of shellfish, bird, fish, and mammal remains, stone and bone tools, and matted sea grass (Phyllospadix sp.). Of the more remarkable finds is a humerus from a subadult Guadalupe fur seal (Arctocephalis towndsendi) with a projectile point tip lodged in the bone. This rare archaeological example of direct marine mammal hunting and other evidence for diverse marine foraging activities demonstrate the research value of eroded sites threatened by rising seas around the world. [ABSTRACT FROM AUTHOR]

The Salina Cruz and Puerto Ángel beach areas in the Gulf of Tehuantepec, Mexican Pacific coast represent an important economic sector of the region. In this study, the mineralogy and geochemistry of bulk sediments, and geochronology of 400 detrital zircons recovered from the beach sediments were analysed to investigate their origin. The sediments are abundant in quartz, feldspar, ilmenite, cordierite, aragonite and anorthite. The chemical index of weathering revealed a moderate to intense weathering in the source area. The chondrite normalized REE patterns of bulk sediments are similar to the found in the Upper Continental Crust, suggesting the derivation of sediments from felsic igneous rocks. The REE patterns of zircons and the trace elemental ratios reveal a continental crust origin. Zircon U–Pb ages in the Salina Cruz beach were represented by Proterozoic (~545.1–1314.1 Ma; n = 170) and Cenozoic (~0.01–66 Ma; n = 20). The Puerto Ángel beach was abundant in Proterozoic zircon grains (~600.9–1171.4 Ma; n = 109) and followed by Mesozoic grains (~73.78–246.9 Ma; n = 40). The comparison of zircon U–Pb ages of this study with probable source rocks reveals that the Oaxaquia Terrane and Chiapas Massif Complex were the major contributors of Proterozoic zircons to the coastal areas. Similarly, the results indicate that the Cenozoic zircons were contributed by the Chiapas Massif Complex, coastal batholith and Cuicateco Terrane. The Mesozoic zircons are very few, derived from the nearby Xolapa Complex and the Chuacús Terrane. [ABSTRACT FROM AUTHOR]

The impacts of large‐scale disturbance events on the species diversity of rocky intertidal sessile assemblages across multiple spatial scales are not well understood. To evaluate the influence of the 2011 Tohoku Earthquake on alpha and beta diversities of rocky intertidal sessile assemblages, we surveyed sessile assemblages in the mid‐shore zone from 2011 to 2019 and compared the data with those collected from 2003 to 2010 before the earthquake at the same region. The census was conducted across 22 study plots on five rocky shores along 30 km of the Sanriku Coast of Japan, which is located 150–160 km north–northwest of the earthquake epicenter. Alpha diversity was measured with three Hill numbers (H0, H1, and H2), which represent the number of equally common species that would exist in a community with the same diversity as the sampled community, with higher values of the subscript indicating more weight placed on abundant species. Beta diversity was measured with two metrics (BDtotal at two spatial scales). Values were compared between the post‐earthquake period (2011–2019) and the pre‐earthquake period (2003–2010). The results show that the Tohoku Earthquake significantly altered the species diversity of intertidal sessile assemblages across multiple spatial scales. All diversity metrics obtained at multiple spatial scales (i.e., alpha diversities: H0, H1, and H2; beta diversities: BDtotal at the shore and regional scales) decreased immediately after the earthquake and then increased in subsequent years. At 2 years after the earthquake, H0 recovered to within the range of pre‐earthquake values and H1 and H2 became significantly higher than pre‐earthquake values. Most metrics of alpha and beta diversities recovered to pre‐earthquake levels after several years, but regional BDtotal remained low for a longer period. [ABSTRACT FROM AUTHOR]

A morphological study of S. boneti (Parisi, 1972) and its intraspecific variation is presented, providing a complete description with drawings, and photos. New records for this and other species are given. [ABSTRACT FROM AUTHOR]

There has been a limited number of studies on the effects of harmful algal blooms (HABs) on natural rocky intertidal ecosystems. From mid-September to early November 2021, an unprecedented HAB caused by Karenia selliformis hit the Pacific coast of southeast Hokkaido, Japan, for the first time, causing massive mortalities among marine organisms. To clarify the immediate impacts of the HAB on the abundance of 10 rocky intertidal species in four functional groups (macroalgae, sessile invertebrates, molluscan grazers, and molluscan carnivores), we focused on two questions: (1) How did the HAB affect the abundance of each species differently at the regional scale? and (2) How did the impacts of the HAB on the abundance of each functional groups vary spatially, and was the spatial variation of the HAB impacts related to the spatial distribution of the cell density of HAB species? To study these issues, we compared census data for 17 years before the HAB and within one month after it for five shores on the southeast coast of Hokkaido. The results showed that two macroalgae species and all three molluscan grazer species declined significantly after the HAB. Moreover, the decrease in molluscan grazers was significantly correlated with cell density. These results suggest that the impacts of the HAB in southeast Hokkaido on the abundance of rocky intertidal organisms are highly variable depending on species and locality, presumably because of differences in species-specific tolerances to HAB toxins and the spatial variation in the density of the HAB organisms. [ABSTRACT FROM AUTHOR]

Predicting coastal change depends upon our knowledge of postglacial relative sea-level variability, partly controlled by glacio-isostatic responses to ice-sheet melting. Here, we reconstruct the postglacial relative sea-level changes along the Caribbean and Pacific coasts of northwestern South America by numerically solving the sea-level equation with two scenarios of mantle viscosity: global standard average and high viscosity. Our results with the standard model (applicable to the Pacific coast) agree with earlier studies by indicating a mid-Northgrippian high stand of ~2 m. The high-viscosity simulation (relevant to the Caribbean coast) shows that the transition from far- to intermediate-field influence of the Laurentide Ice Sheet occurs between Manzanillo del Mar and the Gulf of Morrosquillo. South of this location, the Colombian Caribbean coast has exhibited a still stand with a nearly constant Holocene relative sea level. By analyzing our simulations considering sea-level indicators, we argue that tectonics is more prominent than previously assumed, especially along the Caribbean coast. This influence prevents a simplified view of regional relative sea-level changes on the northwestern South American coast. [ABSTRACT FROM AUTHOR]

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We report the capture of a single specimen of the slimy eel Eptatretus polytrema (Girard, 1855) off the coast of the city of Arica, northern Chile. This find extends the currently known range of the species by 1,600 km northwards from the city of Caldera (Atacama Region) to Puerto Montt (Lake Region). We discuss the importance of finding this species in the extreme north of Chile and the need for additional sampling to confirm the continuous range of E. polytrema between Caldera and Arica.

There has been a limited number of studies on the effects of harmful algal blooms (HABs) on natural rocky intertidal ecosystems. From mid-September to early November 2021, an unprecedented HAB caused by Karenia selliformis hit the Pacific coast of southeast Hokkaido, Japan, for the first time, causing massive mortalities among marine organisms. To clarify the immediate impacts of the HAB on the abundance of 10 rocky intertidal species in four functional groups (macroalgae, sessile invertebrates, molluscan grazers, and molluscan carnivores), we focused on two questions: (1) How did the HAB affect the abundance of each species differently at the regional scale? and (2) How did the impacts of the HAB on the abundance of each functional groups vary spatially, and was the spatial variation of the HAB impacts related to the spatial distribution of the cell density of HAB species? To study these issues, we compared census data for 17 years before the HAB and within one month after it for five shores on the southeast coast of Hokkaido. The results showed that two macroalgae species and all three molluscan grazer species declined significantly after the HAB. Moreover, the decrease in molluscan grazers was significantly correlated with cell density. These results suggest that the impacts of the HAB in southeast Hokkaido on the abundance of rocky intertidal organisms are highly variable depending on species and locality, presumably because of differences in species-specific tolerances to HAB toxins and the spatial variation in the density of the HAB organisms.

Copyright of Intus-Legere Historia is the property of Intus-Legere Historia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista de Ciencias is the property of Universidad del Valle and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Mexicana de Biodiversidad is the property of Universidad Nacional Autonoma de Mexico, Instituto de Biologia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

We present two new records of the colonial cup coral Coenocyathus bowersi Vaughan, 1906 from northern Chile. Colonies were collected off the coastal of Taltal, Antofagasta Region, and off the coast of the city of Iquique, Tarapacá Region, both in northern Chile. Our finds confirm the presence of this species on the Chilean coast and extend the geographic range of this species approximately 765 km north from the only other known occurrences of C. bowersi in Chile. [ABSTRACT FROM AUTHOR]

Elucidating factors ("drivers") that influence succession after disturbance can explain ecological phenomena, including why communities vary spatiotemporally. To gain insight on drivers related to habitat availability, species availability, and species performance during succession, we conducted two field experiments on infaunal communities in intertidal mudflats, one on each of the Atlantic and Pacific coasts of Canada, that had disturbances of different type, size, and frequency. Related to habitat availability drivers, we observed that disturbance type and size, which differed between experiments, did not change end patterns of succession; however, disturbance frequency, directly assessed in one experiment, did. Dispersal of species from surrounding mudflat and water column (species availability) was the primary driver of succession, whereas local interactions between species after colonization (species performance drivers) did not have a detectable effect. We suggested that ample space and resources diffused competition and predation effects, and so species replacements did not occur in our systems, resulting in a lack of "traditional" successional dynamics as observed in other ecosystems. Our findings that community composition in intertidal mudflats is strongly influenced by species availability on two different coasts suggest that this driver may be key to variation in intertidal mudflat communities elsewhere. [ABSTRACT FROM AUTHOR]

Previous studies have estimated the sea level rise (SLR) at various locations on the west coast of the USA and Vancouver Island in Canada. Here, we construct an entire SLR profile from Vancouver Island in the Pacific Northwest to San Diego in Southern California. First, we process global navigation satellite system (GNSS) measurements at 405 stations blanketing the whole coast to generate a profile of vertical land motion (VLM) known to bias century-long tide gauge (TG) measurements recording relative SLR (RSLR). We are then able to estimate the absolute SLR (ASLR) by correcting the SLR with the VLM. Our study emphasizes the relationship between the various tectonic movements (i.e., the Cascadia subduction zone, the San Andreas strike-slip fault system) along the Pacific coast which renders it difficult to accurately estimate the SLR. That is why we precisely model the stochastic noise of both GNSS and tide gauge time series using a combination of various models and information criterions (ICs). We also use the latest altimetry products and sea surface height (SSH) to compare it with ASLR at the same location as the TGs. This study supports previous analysis that the power law + white noise and generalized Gauss–Markov + white noise models are the best stochastic noise models for the GNSS time series. The new coastal profile confirms the large variability of VLM estimates in the Pacific Northwest around the Cascadia subduction zone in agreement with previous studies, and a similar result when the San Andreas fault comes onshore in Central California (San Francisco Bay). Negative RSLR values are mostly located in the Pacific Northwest (Vancouver Island and Olympic Peninsula). We also observe a much bigger variation (about 90–150%) of the ASLR in the Pacific Northwest which is predominantly due to glacial isostatic adjustment (GIA). Moreover, the comparison between the ASLR and the SSH estimates shows similarities in the center of the studied area (South Washington, Oregon planes, and some parts of Southern California) where the tectonic activity does not significantly influence the TG measurements. Finally, the twentieth-century satellite geocentric ocean height rates show a global mean of 1.5 to 1.9 mm/yr. Our estimates based on ASLR and SSH are within this interval. [ABSTRACT FROM AUTHOR]

Background: Large numbers of exotic marine species have been introduced worldwide. Monitoring of introduced species is important to reveal mechanisms underlying their establishment and expansion. Balanus glandula is a common intertidal barnacle native to the northeastern Pacific. However, this species has been introduced to Japan, South America, South Africa, and Europe. While a latitudinal genetic cline is well known in its native range, it is unclear whether such a genetic cline occurs in introduced areas. Twenty years have passed since it was first identified in Japan and its distribution now ranges from temperate to subarctic regions. Methods: In the present study, we examined genotypes of cytochrome oxidase subunit I (COI) of mitochondrial (mt)-DNA and elongation factor 1a (EF1) across the distribution of B. glandula in Japan at high and mid intertidal zones. Results: At all sampling sites, native northern genotypes are abundant and I did not detect significant effects of latitude, tide levels, or their interaction on genotypic frequencies. Further, I did not detect any change of genotype composition between data collected during a study in 2004 and samples in the present study collected in 2019. Data from the present study offer an important baseline for future monitoring of this species and supply valuable insights into the mechanisms of establishment and expansion of introduced marine species generally. [ABSTRACT FROM AUTHOR]

Abstract Elucidating factors (“drivers”) that influence succession after disturbance can explain ecological phenomena, including why communities vary spatiotemporally. To gain insight on drivers related to habitat availability, species availability, and species performance during succession, we conducted two field experiments on infaunal communities in intertidal mudflats, one on each of the Atlantic and Pacific coasts of Canada, that had disturbances of different type, size, and frequency. Related to habitat availability drivers, we observed that disturbance type and size, which differed between experiments, did not change end patterns of succession; however, disturbance frequency, directly assessed in one experiment, did. Dispersal of species from surrounding mudflat and water column (species availability) was the primary driver of succession, whereas local interactions between species after colonization (species performance drivers) did not have a detectable effect. We suggested that ample space and resources diffused competition and predation effects, and so species replacements did not occur in our systems, resulting in a lack of “traditional” successional dynamics as observed in other ecosystems. Our findings that community composition in intertidal mudflats is strongly influenced by species availability on two different coasts suggest that this driver may be key to variation in intertidal mudflat communities elsewhere.

Cacao farmers face many challenges to increase yield while adjusting their farms to future environmental and socio-economic uncertainties. Improving the management practices of cacao (Theobroma cacao L.) cultivation systems requires knowledge of their baseline and the determining factors affecting them. The main goal of this research was to characterize traditional cacao agroforestry systems of smallholder farmers in the Municipality of Tumaco, Nariño, Colombia. Using a semi-structured survey and a sample of 218 farmers, the socioeconomic characteristics of the cacao production system were analyzed. Multiple correspondence analysis (MCA) and principal component analysis (PCA) grouped and discriminated the cacao growers. The PCA formed five components representing 50.86% of the total variability, while the ACM grouped them into five factors explaining 29.82% of the variability. The cacao cultivation is a traditional activity of smallholder farmers with very low yields. The age of the farmers is over 50 years old, with despicable levels of education; there was no evidence of generational change. The study shows that the traditional cacao production system is not an attractive activity for young people or investors given its marginality and low economic projection. Timely strategies and subsequent early actions will be imperative to face the main environmental, socio-economic, and productive challenges, which will allow the cacao activity to be a source of well-being for cacao growers and the environment in the region.

Rare Pacific coast fog ecosystems are under threat from climate change and local factors. Although coastal fog is known to affect soil properties and microbial diversity, few studies on the Pacific coast have examined the specific microbiomes associated with these ecosystems. We evaluated the effects of coastal fog on the physicochemical, mineralogical, and microbiological properties of bare soils (vegetation‐free) and bulk soils (surrounding plant roots) from different altitudes in the Morro Moreno National Park (MMNP) in the Antofagasta region, Chile. We found that the temperature and relative humidity of the soil varied temporally (daily) and spatially (with altitude). We detected that soil organic matter and organic phosphorus content tended to increase with altitude, whereas the pH, electrical conductivity, and total phosphorus decreased. Our results showed that coastal fog could induce physical weathering below 300 masl and chemical weathering at the intermediate altitudes of ~400–600 masl. The biodiversity of bacteria and fungi increased considerably above 400 masl. Actinobacteria and Bacteroidetes dominated the bacteria in bare soil, and Bacteroidetes dominated the bulk soil communities at all altitudes. Ascomycota and Basidiomycota dominated the fungal community in both soil types. Moreover, the electrical conductivity and CaO content appear to be more closely associated with microbial communities from lower altitudes. In addition, the organic carbon content, humidity, and weathering index 2 (WI2) isolated some communities at 500 and 600 masl. The microbiological diversity reported in this work reflects the variable and different microbial niches comprising the MMNP environment. Linkages between soil property and microbial variations with altitude within this Northern Chilean coastal fog ecosystem were elucidated. This novel scientific knowledge contributes to global network strategies for fog ecosystem conservation, which aim to preserve the microbial niches and diversity in such soils. Highlights: We studied physicochemical, mineralogical and microbiological properties in a fog ecosystem soils.The study provides valuable information from rare and unique Pacific coast fog systems.Soil properties and microbial diversity showed specific correlations, and dependence on altitude.This baseline could contribute to the creation of conservation strategies of these unique ecosystems. [ABSTRACT FROM AUTHOR]

Band‐tailed pigeons (Patagioenas fasciata) congregate at and use mineral sites (mineralized water or soil) primarily within the breeding range of the Pacific Coast band‐tailed pigeon (P. f. monilis), but the Interior band‐tailed pigeon (P. f. fasciata) generally does not exhibit this behavior. Differences in supplemental minerals used between subspecies could be explained by differences in the diet (grit and foods) of these birds between their regional ranges. We necropsied 1,169 band‐tailed pigeons and sampled 35 primary foods of band‐tailed pigeons in the United States range of the Interior (AZ, CO, NM, and UT) and Pacific Coast (CA, OR, and WA) band‐tailed pigeons to evaluate regional differences in mineral and moisture in gastroliths and food items, and the association of grit with food items consumed. Grit and food types consumed by pigeons were similar between subspecies, but grit amount varied with foods consumed and food items varied with season and region in association with plant distribution and phenology. Gastroliths contained small amounts (≤3.3% each) of calcium, sodium, and potassium and were smooth and polished, indicating relatively long‐term retention and use primarily in food abrasion. Foods universally contained low amounts of sodium (0–328 ppm), moderate calcium (100–7,250 ppm), and high potassium (4,400–22,600 ppm), but varied somewhat with food type (e.g., acorns, berries, cultivated grains, pine seeds). Moisture and mineral content of grit consumed and foods used by Interior and Pacific Coast band‐tailed pigeons did not differ between their regional ranges in explaining differential use of supplemental mineral sites. Band‐tailed pigeon's use of supplemental sodium may not be necessary for survival and reproduction because Interior pigeons rarely use supplemental mineral sites unlike Pacific Coast pigeons despite similarities in moisture and mineral content of grit and foods consumed. Band‐tailed pigeons are able to concentrate sodium and calcium in crop milk to meet the nutritional needs of hatchlings despite a diet low in sodium and calcium. [ABSTRACT FROM AUTHOR]

The Wilson's Plover (Charadrius wilsonia) occurs along the Atlantic and Pacific coasts from the United States to Brazil, and occasionally in Chile. It is known to breed in the United States, Mexico, Belize, El Salvador, Costa Rica, Colombia, Brazil, Jamaica, the West Indies, and Peru. Outside the United States, we know little about its reproduction and nesting site habitats. On 12 May 2019, we observed a female at a nest with 3 eggs and a separate pair of adults with 2 chicks around the ponds of the Mayasal shrimp farm in Jutiapa, Guatemala. These 2 reports are the first records of Wilson's Plover nesting in Guatemala. Conservation concerns on both breeding and wintering areas include habitat loss, climate change, and human disturbance, as well as a small population size and restricted reproductive range. [ABSTRACT FROM AUTHOR]

We present stable isotope and osteological data from human remains at Paloma, Chilca I, La Yerba III, and Morro I that offer new evidence for diet, lifestyle, and habitual mobility in the first villages that proliferated along the arid Pacific coast of South America (ca. 6000 cal BP). The data not only reaffirm the dietary primacy of marine protein for this period but also show evidence at Paloma of direct access interactions between the coast and highlands, as well as habitual mobility in some parts of society. By locating themselves at the confluence of diverse coastal and terrestrial habitats, the inhabitants of these early villages were able to broaden their use of resources through rounds of seasonal mobility, while simultaneously increasing residential sedentism. Yet they paid little substantial health penalty for their settled lifestyles, as reflected in their osteological markers of stature and stress, compared with their agriculturalist successors even up to five millennia later. Contrasting data for the north coast of Chile indicate locally contingent differences. Considering these data in a wider chronological context contributes to understanding how increasing sedentism and population density laid the foundations here for the emergence of Late Preceramic social complexity. [ABSTRACT FROM AUTHOR]

Global coastal aquatic ecosystems are negatively impacted by the introduction of harmful aquatic species through the discharge of ships’ ballast water. To reduce discharges of harmful aquatic organisms and pathogens, such as toxic phytoplankton species, ships are now transitioning to the use of ballast water management systems (BWMS) instead of ballast water exchange (BWE). This study examines the abundance and diversity of phytoplankton in ballast water managed by BWMS (or a combination of both BWE + BWMS) in comparison to those in ballast water managed by BWE alone (collected from ships arriving to Canada’s Pacific coast in 2017–2018 and 2008, respectively). The abundance and diversity of phytoplankton species were also examined in relation to key variables such as ballast water salinity and ballast water age. Total abundance of phytoplankton was significantly lower in preserved samples managed by either a BWMS or BWE + BWMS compared to BWE alone. Abundances in preserved samples were higher than observed in fresh (unpreserved) samples at the time of collection, with all samples managed by a BWMS meeting international limits for the number of viable organisms ≥10 and

We report the capture of a single specimen of the species Paulia horrida Gray, 1840, off the coast of Arica, in the Arica and Parinacota Region, Northern Chile. This finding extends the currently known distributional range of the species by 2,434 km towards the south, since the southernmost known area for this species corresponds to Punta Sal, Peru. We discuss the importance of finding this relatively unknown species in Chile and the need to continue sampling to confirm the continuous distributional range of the species between the south of Peru and the north of Chile. [ABSTRACT FROM AUTHOR]

Aim: As within‐species genomic data have been shown useful in interpreting broader biogeographic trends, we analysed the mode of population genomic isolation involved in a well‐studied intertidal genomic cline to better understand the mechanisms maintaining it. These results were interpreted in the context of spatial variation in habitat use and availability as well as likely fitness consequences for hybridization between the two lineages. Location: Pacific coast of North America. Taxon: Arthropods (Class Maxillopoda, Order Sessilia, Family Balanidae; Balanus glandula). Methods: Genotype‐by‐sequencing approaches were used to generate single‐nucleotide polymorphism markers across sites sampled between southern Alaska and Southern California. Inference using standard population genomic methods, including analysis of population structure, inbreeding and linkage disequilibrium, was used to identify the steepest transitions across the largest number of loci examined. These data were put in the context of observed population density and habitat availability. Results: We show that the majority of markers analysed show strong clinal transitions in a very narrow portion of the California coast. Patterns of linkage disequilibrium among markers, along with prior evidence of variation in reproductive potential by latitude and by mitochondrial lineage, suggest some reproductive isolation among the northern and southern lineages of B. glandula that are concordant with the drop in population density and habitat availability in central California. Main Conclusions: A significant clinal transition in genomic diversity is stronger and more localized than previously recognized and exhibits statistical patterns suggesting that the lineages are reproductively and phenotypically distinct in ways that may be ecologically important. As this species has been used to infer process in coastal biogeography, further study of concordant patterns will be important for advancing our understanding of this region. [ABSTRACT FROM AUTHOR]

Dental modifications, especially dental inlays, were one of the most characteristic biocultural traditions in Ancient Mesoamerica. The main objective of this brief report is to identify the raw material used to elaborate dental inlays in the archaeological site of Reynosa, located in the Southern Pacific Coast of Guatemala. The recent discovery of a massive burial, dated roughly in the Middle-Late Preclassic Period (500 BC–200 BC), put the site in the spotlight. There were found some of the earliest carriers of dental incrustations in Mesoamerica, which represent part of the beginning of the inlay tradition. The analytical method used to determine the raw material was scanning electron microscopy (SEM) with X-ray spectroscopy. The identified raw materials were pyrite and hematite. These findings have opened new concerns about the obtaining and the usage of those materials in this millennial tradition.

Copyright of Revista de Ciencias Agricolas is the property of University of Narino, Faculty of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The parasite communities of marine fish in the tropical Pacific remain poorly studied. We did an initial study of the metazoan parasite communities of striped bonito Sarda orientalis from the Pacific coast of Mexico. Two hundred thirty individuals from two locations were collected between April 2017 and March 2018. Twenty-two metazoan parasite taxa (20 helminths and two Crustacea) were identified: one species of Monogenea, twelve of Digenea, one of Acanthocephala, two of Cestoda, four of Nematoda, one of Copepoda, and one of Isopoda. Didymozoid digeneans (six species) were the most frequent and abundant parasite species at both sampling locations. Parasite species richness at the component community level was similar in both locations (16–17 species). However, parasite community structure and species composition varied between them. Local fluctuations in some biotic (e.g. host feeding behaviour and body size) and abiotic environmental factors were probably responsible for these variations. [ABSTRACT FROM AUTHOR]

Beginning by at least the Andean Middle Horizon (AD 600–1000), sites located more than 60 km inland from the Pacific coast in far southern Peru contain the remains of jack mackerel (Trachurus murphyi). The coastal region near the modern Peruvian city of Ilo was the habitat where people procured fish and transported them to sites in the Moquegua Valley. Abundant neurocranial fragments indicate that coastal occupants shipped whole fish, not processed body portions, to inland destinations. I previously interpreted the remains of jack mackerel as imported fishes indicating high status deposits, particularly at imperial administrative outposts associated with the Wari Empire. The recent identification of jack mackerel at highly provisional, agricultural sites inhabited by non-elite residents suggests that these fishes were everyday, rather than elite, fare. The analysis indicates that the pre-Hispanic inhabitants discontinued trade in marine fishes after the collapse of the politically integrated empires in the region, but people reestablished fish trade in subsequent time periods. I examine the probable capture methods and possible culinary reasons as to why the Chilean jack mackerel is common at some inland sites in far southern Peru. [ABSTRACT FROM AUTHOR]

Henry Eccles, in classic studies on logistics, describes the dynamics of strategic procurement in the supply chain stretching from home countries to military theatres of operations. Naval authorities and industrialists concerned with Japanese aggression before and after Pearl Harbor looked towards developing shipbuilding capacity on North America's Pacific Coast. The region turned into a volume producer of merchant vessels, warships and auxiliaries destined for service in the Pacific and Indian Oceans. Shipbuilding involved four broad categories of companies in the United States and Canada that enabled the tremendous production effort. [ABSTRACT FROM AUTHOR]

Recent research is shedding light on the long and precocious urban tradition of the Pacific coastal rim of southeastern Mesoamerica, from eastern Soconusco, Mexico, to Escuintla, Guatemala. The available data provide a basis to discuss variations in urban shape and functions, and to a lesser extent, urban life and meaning at Formative and Classic cities, plus brief mention of Late Postclassic cities. Pacific coastal cities are larger and earlier than previously thought, and their investigation is relevant for comparative studies that aim to understand the variability of ancient urban societies in Mesoamerica and beyond. [ABSTRACT FROM AUTHOR]

We report Black-throated Flower-piercer, Diglossa brunneiventris (Lafresnaye, 1846), and Least Tern, Sternula antillarum (Lesson, 1847), in the Tambo river estuary, Islay province, Arequipa department, Peru. Both species are newly documented from the southern coast of Peru. It is probable that D. brunneiventris has descended from the higher, inland portion of the Tambo river basin to the estuary. Sternula antillarum is considered a frequent visitor to the South American Pacific coast. [ABSTRACT FROM AUTHOR]

In this paper, information is added and comments are made about two recently described Peruvian species of Liolaemus from the montanus group: L. balagueri and L. qalaywa. When L. balagueri was described, differences from L. nazca was based on a phylogenetic analysis of a single mitochondrial locus, but without including phenotypic diagnostic traits that might differentiated them. On the other hand, L. qalaywa description was based upon specimens from Apurirnac department and intraspecific variation in meristic traits were missing. In this study, we added a molecular and morphological analyses between L. balagueri and L. nazca, supporting more rigorously the separation between these two taxa. In addition, the geographic range of L. qalaywa is extended to Cusco department (southwestern Peru), intraspecific variation of morphological characteristics and geographic information up to 79 specimens are included, and the conservation issues of this species is commented. [ABSTRACT FROM AUTHOR]

Globally, marine sandy beaches face increasing anthropogenic pressures. Long-term maintenance of their functional capacities depends strongly on robust autochthonous biotic community baseline data. However, fine-scale temporal patterns remain poorly understood in human-impacted sites, limiting our knowledge of beach response to stressors. Marine arenicolous fungi represent a neglected group of endopsamon microorganisms (living within sandy sediments) that fulfills key ecological roles mainly as saprobes. Preliminary data suggests that this fungal group is threatened by anthropogenic disturbances in tourist beaches, yet knowledge on their ecological plasticity and fine-scale patterns is lacking. To address this knowledge gap, we investigated marine fungal community composition changes over a fine temporal scale (biweekly, over a four-month period) at an impacted Pacific tourist sandy beach, and explored associations between community composition and key environmental variables. We identified 17 taxa, within four ecological groups: strict marine arenicolous fungi (Arenariomyces majusculus, Corollospora gracilis, Corollospora maritima, Corollospora sp. 1 and 2), non-arenicolous marine fungi (Nia sp.), terrestrial borne opportunistic pathogens (Arthrographis kalrae, Parengyodontium album, Neocosmospora solani, Scopulariopsis sp., and Exophiala sp.), and facultative marine species (Aspergillus terreus and Penicillium sp.). In agreement with our hypothesis, minor fine temporal scale changes in community structure suggest arenicolous fungi persist on the beach as inoculum. Nevertheless, we detected changes in the intertidal fungal community structure in response to environmental variables, shown by the increase of terrestrial borne pathogenic species in the rainy season. Lastly, our data warn against extensive beach grooming, which may lead to the direct reduction of strict marine arenicolous fungal groups. [ABSTRACT FROM AUTHOR]

The many Coast Salish groups distributed on both sides of the United States-Canada border on the Pacific coast today face significant obstacles to cross the international border, and in some cases are denied passage or intimidated into not attempting to cross. The current situation regarding travel by Aboriginal people reflects the "hardening" of the border by United States officials following the events of "9-11." A bureaucratic environment has become increasingly hostile to the interests of Aboriginal groups in favor of security. In addition, the problems encountered by individual Aboriginal travelers at the border reflect a transformed American impression of Canada, now commonly treated politically and administratively as a state from which enemies of America are positioned to harm American interests. These new perceptions create an environment that enables Homeland Security officers to regard Aboriginal peoples who seek to cross the border as suspect, although they do so under legal conventions that allow passage of Aboriginal peoples. Officers then act on their own received, stereotypical notions of what a "real Indian" looks like, and deny passage to those they consider to be fakes. These border issues reflect a larger pattern of the denial of Aboriginal rights and challenges to tribal sovereignty by the American state and its citizenry. Data for this work comes from interviews with Coast Salish people and the case of a Coast Salish man who was detained and prosecuted for attempting to cross the border. A justice summit held in 2003 provides direct insight into official American approaches to the border as they concern Aboriginal people, while reporting by the Seattle Times reveals local responses to 9-11.

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Dental modifications, especially dental inlays, were one of the most characteristic biocultural traditions in Ancient Mesoamerica. The main objective of this brief report is to identify the raw material used to elaborate dental inlays in the archaeological site of Reynosa, located in the Southern Pacific Coast of Guatemala. The recent discovery of a massive burial, dated roughly in the Middle-Late Preclassic Period (500 BC–200 BC), put the site in the spotlight. There were found some of the earliest carriers of dental incrustations in Mesoamerica, which represent part of the beginning of the inlay tradition. The analytical method used to determine the raw material was scanning electron microscopy (SEM) with X-ray spectroscopy. The identified raw materials were pyrite and hematite. These findings have opened new concerns about the obtaining and the usage of those materials in this millennial tradition. [ABSTRACT FROM AUTHOR]

Radiocarbon ages on mollusk shells, which account for about half of the more than 8,000 dates from cultural deposits on the west coast of North America, need to be corrected for the local marine reservoir effect (ΔR) to yield true ages. Assays on "pre-bomb" shells show that ΔR increases poleward, echoing the age gradient in offshore waters. The meridional gradient in ΔRis not appreciably affected by the transition either from an upwelling regime to a downwelling regime north of 40°N--45°N or from a winter maximum-high alkalinity river discharge pattern to a summer maximum-low alkalinity pattern at the same latitude, probably because these changes are offset by increasing storminess and tidal energy in coastal areas. Mesoscale variations in ΔR along this gradient are attributable to contrasts in shore morphology and exposure. Data from123 shell-wood pairs reveal similar patterns of temporal variation in ΔR in the late Holocene in the coastal ecoregions. The characteristic temporal pattern echoes phases of variable El Niño-Southern Oscillation (ENSO) activity. The high degree of variability in ΔR argues against the indiscriminate application of regionally uniform or trans-Holocene ΔR values and demands improvements in spatiotemporal resolution if shell is used to date cultural deposits. [ABSTRACT FROM AUTHOR]

Anthopleura mariae sp. nov. is a new species of sea anemone (Actiniaria: Actiniidae) from the rocky intertidal of Punta Morro, Baja California, and Punta Eugenia Baja California Sur, México. This species is characterized by a column with verrucae arranged in longitudinal rows from margin to limbus with a red spot atop each verruca, as well as the presence of more than two siphonoglyphs and the lack of directive mesenteries. Differences between Anthopleura mariae sp. nov. with other species of the genus are discussed. This is the sixth species of Anthopleura documented for the Mexican Pacific. [ABSTRACT FROM AUTHOR]

The Americas were the last continental areas to be inhabited by modern human beings. The Jesuit Father de Acosta had already proposed in 1590 that the first peopling might have involved the use of watercraft through the north Pacific. Still today researchers are debating whether the first inhabitants of the continent arrived from the northwest or the northeast and when this occurred. What may help solve these questions is the great amount of indirect evidence suggesting the first settlers had already developed a maritime culture and very likely a seafaring technology. Implications of considering this statement as valid are that it can shed new light on old problems related to the high mobility of groups, the use of maritime and riverine resources, the location of the first settlement camps near the coast, the transportation of raw materials from very long distances, and different aspects of social organization related to technological development. Bearing these ideas in mind, watercourses should not be considered as obstacles, but on the contrary, as elements of connection. [ABSTRACT FROM AUTHOR]