Evaluating Lake Life to Monitor Ecological Health at Finima Park

David Palenski
17th January, 2024

Evaluating Lake Life to Monitor Ecological Health at Finima Park

The Niger Delta ecoregion

Photo adapted from: Z3lvs / CC BY SA (Source)
The Niger Delta, a region rich in biodiversity, is facing increasing environmental pressures. Pristine ecosystems are becoming rare, making it difficult to understand how these environments naturally function and change over time. Understanding these natural changes – known as ecological succession – is crucial for effective conservation. The Finima Nature Park (FNP) and its lake, locally known as Bonny Lake, offer a unique opportunity to study this process in a relatively undisturbed environment, and is being considered for designation as a RAMSAR site – wetlands of international importance. Researchers from the University of Port Harcourt[1] undertook a study to establish a baseline understanding of the lake’s ecological health. They focused on macrozoobenthos – the visible, bottom-dwelling organisms that live in the sediment of the lake. These creatures, including insects, worms, and crustaceans, are valuable indicators of water quality because they are sensitive to environmental changes, live for relatively long periods, and don’t move around much. By monitoring the types and abundance of these organisms, scientists can assess the overall health of the aquatic ecosystem. The study involved collecting data on the macrozoobenthos community and key water quality parameters – things like pH, dissolved oxygen (DO), and temperature – every month throughout 2018. The researchers found that while temperature and DO were consistent throughout the lake, other factors like pH varied depending on location and time of year. Importantly, the diversity of macrozoobenthos was found to be low. This suggests the ecosystem is not yet fully developed or is under some level of stress. The distribution of different macrozoobenthos species was strongly linked to pH, DO, and temperature. The prevalence of species tolerant to low oxygen levels indicates that oxygen availability is a key factor shaping the lake’s ecosystem. This finding aligns with broader research on assessing ecological quality in estuarine and coastal environments, where methods like the Marine Biotic Coefficient (BC) are used to evaluate the health of soft-bottom habitats[2]. The BC, like the macrozoobenthos assessment, relies on the types of organisms present to determine the level of environmental impact. The study’s findings are particularly relevant when considering the impacts of pollution. Other research has highlighted the detrimental effects of various pollutants on aquatic ecosystems, including organic matter, heavy metals, and agricultural runoff[3]. The low diversity observed in FNP Lake could be an early warning sign of potential pollution impacts, even if current levels appear relatively low. The identification of pH, DO, and temperature as key drivers of macrozoobenthos distribution provides a focused approach for future monitoring efforts. Furthermore, understanding the interplay between oxygen and nutrient levels is crucial. Studies have shown that simultaneous changes in these factors can significantly impact aquatic communities, even without necessarily altering decomposition rates[4]. While the University of Port Harcourt study didn’t directly investigate nutrient levels, the emphasis on DO suggests that maintaining adequate oxygen levels is vital for supporting a healthy macrozoobenthos community and overall ecosystem function in FNP Lake. The baseline data collected in this study will be essential for tracking future changes and assessing the effectiveness of any conservation measures implemented in the park.

EnvironmentWildlifeSustainability

References

Main Study

1) Assessment of macrozoobenthos baseline diversity for monitoring the ecological quality of Finima Nature Park Lake.

Published 15th January, 2024

https://doi.org/10.1007/s10661-024-12325-7

Related Studies

2) The application of a Marine Biotic Index to different impact sources affecting soft-bottom benthic communities along European coasts.

Journal: Marine pollution bulletin, Issue: Vol 46, Issue 7, Jul 2003

3) Combination of water quality, pollution indices, and multivariate statistical techniques for evaluating the surface water quality variation in Can Tho City, Vietnam.

https://doi.org/10.1007/s10661-022-10474-1

4) Combined Effects of Dissolved Nutrients and Oxygen on Plant Litter Decomposition and Associated Fungal Communities.

https://doi.org/10.1007/s00248-017-1099-3


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