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61 results on '"Canario, Joao"'

1. Sentinel responses of Arctic freshwater systems to climate: linkages, evidence, and a roadmap for future research

Author

Saros, Jasmine E, Arp, Christopher D, Bouchard, Frédéric, Comte, Jérôme, Couture, Raoul-Marie, Dean, Joshua F, Lafrenière, Melissa, MacIntyre, Sally, McGowan, Suzanne, Rautio, Milla, Prater, Clay, Tank, Suzanne E, Walvoord, Michelle, Wickland, Kimberly P, Antoniades, Dermot, Ayala-Borda, Paola, Canario, Joao, Drake, Travis W, Folhas, Diogo, Hazuková, Václava, Kivilä, Henriikka, Klanten, Yohanna, Lamoureux, Scott, Laurion, Isabelle, Pilla, Rachel M, Vonk, Jorien E, Zolkos, Scott, and Vincent, Warwick F

Subjects
Climate Action, Climate change, climate indicators, Arctic lakes, Arctic rivers, polar limnology
Abstract

While the sentinel nature of freshwater systems is now well recognized, widespread integration of freshwater processes and patterns into our understanding of broader climate-driven Arctic terrestrial ecosystem change has been slow. We review the current understanding across Arctic freshwater systems of key sentinel responses to climate, which are attributes of these systems with demonstrated and sensitive responses to climate forcing. These include ice regimes, temperature and thermal structure, river baseflow, lake area and water level, permafrost-derived dissolved ions and nutrients, carbon mobilization (dissolved organic carbon, greenhouse gases, and radiocarbon), dissolved oxygen concentrations, lake trophic state, various aquatic organisms and their traits, and invasive species. For each sentinel, our objectives are to clarify linkages to climate, describe key insights already gained, and provide suggestions for future research based on current knowledge gaps. We suggest that tracking key responses in Arctic freshwater systems will expand understanding of the breadth and depth of climate-driven Arctic ecosystem changes, provide early indicators of looming, broader changes across the landscape, and improve protection of freshwater biodiversity and resources.

Published
2023

6. Ethics of AI: Do the Face Detection Models Act with Prejudice?

Author

Ferreira, Marcos Vinícius, Almeida, Ariel, Canario, João Paulo, Souza, Matheus, Nogueira, Tatiane, Rios, Ricardo, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Woeginger, Gerhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Britto, André, editor, and Valdivia Delgado, Karina, editor

Published
2021
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24. Recognition of Facial Expressions Based on Deep Conspicuous Net

Author

Canário, João Paulo, Oliveira, Luciano, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, and Pardo, Alvaro, editor

Published
2015
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31. Polar marine biology science in Portugal and Spain: Recent advances and future perspectives

Author

Xavier, José C., Barbosa, Andrés, Agustí, Susana, Alonso-Sáez, Laura, Alvito, Pedro, Ameneiro, Julia, Ávila, Conxita, Baeta, Alexandra, Canário, João, Carmona, Raquel, Catry, Paulo, Ceia, Filipe, Clark, Melody S., Cristobo, Francisco J., Cruz, Bruno, Duarte, Carlos M., Figuerola, Blanca, Gili, Josep-Maria, Gonçalves, Ana R., Gordillo, Francisco J.L., Granadeiro, José P., Guerreiro, Miguel, Isla, Enrique, Jiménez, Carlos, López-González, Pablo J., Lourenço, Sílvia, Marques, João C., Moreira, Elena, Mota, Ana M., Nogueira, Marta, Núñez-Pons, Laura, Orejas, Covadonga, Paiva, Vitor H., Palanques, Albert, Pearson, Gareth A., Pedrós-Alió, Carlos, Peña Cantero, Álvaro L., Power, Deborah M., Ramos, Jaime A., Rossi, Sergi, Seco, José, Sañé, Elisabet, Serrão, Ester A., Taboada, Sergi, Tavares, Sílvia, Teixidó, Núria, Vaqué, Dolors, Valente, Tiago, Vázquez, Elsa, Vieira, Rui P., and Viñegla, Benjamin

Published
2013
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49. Reviews and syntheses: Effects of permafrost thaw on Arctic aquatic ecosystems

Author

Vonk, Jorien E, Tank, Suzanne E, Bowden, William B, Laurion, Isabelle, Vincent, Warwick F, Alekseychik, Pavel, Amyot, Marc, Billett, Michael, Canario, Joao, Cory, Rose M, Deshpande, Bethany N, Helbig, Manuel, Jammet, Mathilde, Karlsson, Jan, and Larouche, Julia

Abstract

The Arctic is a water-rich region, with freshwater systems covering about 16 % of the northern permafrost landscape. Permafrost thaw creates new freshwater ecosystems, while at the same time modifying the existing lakes, streams, and rivers that are impacted by thaw. Here, we describe the current state of knowledge regarding how permafrost thaw affects lentic (still) and lotic (moving) systems, exploring the effects of both thermokarst (thawing and collapse of ice-rich permafrost) and deepening of the active layer (the surface soil layer that thaws and refreezes each year). Within thermokarst, we further differentiate between the effects of thermokarst in lowland areas vs. that on hillslopes. For almost all of the processes that we explore, the effects of thaw vary regionally, and between lake and stream systems. Much of this regional variation is caused by differences in ground ice content, topography, soil type, and permafrost coverage. Together, these modifying factors determine (i) the degree to which permafrost thaw manifests as thermokarst, (ii) whether thermokarst leads to slumping or the formation of thermokarst lakes, and (iii) the manner in which constituent delivery to freshwater systems is altered by thaw. Differences in thaw-enabled constituent delivery can be considerable, with these modifying factors determining, for example, the balance between delivery of particulate vs. dissolved constituents, and inorganic vs. organic materials. Changes in the composition of thaw-impacted waters, coupled with changes in lake morphology, can strongly affect the physical and optical properties of thermokarst lakes. The ecology of thaw-impacted lakes and streams is also likely to change; these systems have unique microbiological communities, and show differences in respiration, primary production, and food web structure that are largely driven by differences in sediment, dissolved organic matter, and nutrient delivery. The degree to which thaw enables the delivery of dissolved vs. particulate organic matter, coupled with the composition of that organic matter and the morphology and stratification characteristics of recipient systems will play an important role in determining the balance between the release of organic matter as greenhouse gases (CO2and CH4), its burial in sediments, and its loss downstream. The magnitude of thaw impacts on northern aquatic ecosystems is increasing, as is the prevalence of thaw-impacted lakes and streams. There is therefore an urgent need to quantify how permafrost thaw is affecting aquatic ecosystems across diverse Arctic landscapes, and the implications of this change for further climate warming.

Published
2015

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