Doktorarbeit / Dissertation, 2017
544 Seiten
This work examines the impact of anthropogenic stressors on marine benthic ecosystems, specifically focusing on macrobenthic invertebrate assemblages along the southern coast of Kerala, India. The study aims to understand how various stressors, including hydrological variations, sedimentological characteristics, heavy metal contamination, and polyaromatic hydrocarbon (PAH) pollution, influence the structure and functioning of these communities.
The research is organized into chapters, each focusing on a specific aspect of the study. Chapter I provides an overview of the study area and sampling design, detailing the chosen locations, duration of the study, and sampling methods. Chapter II focuses on the hydrological characteristics of the study sites, exploring the influence of water quality parameters on benthic communities. Chapter III delves into the sedimentological analysis of the study area, investigating the relationship between sediment composition and benthic assemblages. Chapter IV explores the levels of heavy metal contamination in the study area and its potential effects on benthic invertebrates. Chapter V examines the occurrence of PAHs in the study area and its potential impact on macrobenthic communities.
The key focus topics of this research are: marine benthos, anthropogenic stressors, macrobenthic invertebrates, Kerala coast, India, hydrology, sedimentology, heavy metals, polyaromatic hydrocarbons (PAHs), ecological impacts.
Human activities like pollution and industrial waste alter water quality and sediment composition, which can lead to a decline in biodiversity and changes in the community structure of benthic organisms.
These are small animals without backbones, such as worms, mollusks, and crustaceans, that live on or in the sea floor. They are vital indicators of ecosystem health.
The research focused on heavy metal contamination and Polyaromatic Hydrocarbons (PAHs), analyzing their presence in the water and sediments of anthropogenically disturbed regions.
Benthic organisms are relatively sedentary and cannot easily escape pollution. Therefore, their health and population density directly reflect the long-term environmental conditions of a specific site.
Changes in benthic communities affect secondary production and nutrient flow, which can disrupt the entire coastal food web, including fish populations that rely on these invertebrates for food.
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