SEASONAL VARIATION OF ZOOPLANKTONIC COMMUNITY STRUCTURE IN NILJE LAKE, DOMBIVLI.

This research explores the zooplanktonic community in Nilje Lake near Dombivli, emphasizing its role as a vital indicator of aquatic ecosystem health (Nougueria, 2001; Sampaio et al., 2002). The study aims to uncover the dynamics of zooplankton populations across seasons, crucial for understanding the lake's response to environmental changes. Nilje Lake, a crucial natural asset in Dombivli, experiences fluctuating flora and fauna influenced by climatic shifts (Mahor, 2011; Koli and Muley, 2012). The research investigates how zooplankton composition, abundance, and diversity vary in response to seasonal changes, considering factors like water temperature and nutrient availability. Zooplankton, microorganisms vital to the aquatic food web, bridge lower trophic levels (phytoplankton) to higher trophic levels (fish) (Hutchinson, 1967). Recognizing the seasonal dynamics of this community is essential for comprehending the lake's overall stability. Meticulous field sampling and laboratory analyses unveil distinct seasonal trends. Warmer months exhibit increased abundance of specific zooplankton species, potentially linked to elevated temperatures and nutrient availability. Conversely, cooler months witness a shift in composition and decreased overall abundance. These findings offer insights into zooplankton responses to seasonal fluctuations in Nilje Lake, guiding targeted conservation efforts (Singh, 2000). Local authorities and environmentalists can leverage this knowledge for effective lake health preservation. The research contributes to sustainable ecosystem management, emphasizing the necessity of ongoing studies for informed conservation strategies. Microscopic examination reveals fourteen zooplankton genera, with Rotifera dominating (6 genera), followed by Copepoda (4), Cladocera (3), and Ostracoda (1) (Carbonel et al, 1988; Külköylüoðlu, 2003). Cladocerans consistently dominate in abundance. Rotifers exhibit higher species composition, while copepods show lower abundance and diversity. Ostracods, indicative of water quality, demonstrate lower diversity and abundance (Delorme, 1969; Benson, 1990). These findings provide critical ecological insights, essential for targeted conservation strategies in Nilje Lake. [ABSTRACT FROM AUTHOR]