| dc.description.abstract | To know about the trophic level relationship among the zooplankton, phytoplankton, and fish species,
it is important to know about the zooplankton diversity difference through ecosystems. The present
study was conducted to assess the zooplankton diversity difference of the Meghna river estuary in
twenty sites in the month of July 2016. It also aims at identification of the area where higher
disturbance occurs and species displacement risk is high, and also the area where species recruitment
is high. Markov Chain model of ecological communities was utilized to explore general process of
diversity differences of zooplankton between estuarine system and riverine system. Ten species of
zooplankton were identified from sampling sites to run the model. The findings showed that estuary
has high diversity where displacement risk was also high and river had low diversity and species
displacement risk was also low. As predicted by diversity theory, invasion rate curve for estuary was
more skewed than river and proportional abundance of species in estuary was higher than river. The
model also found that disturbance was substantially higher on river than estuary. Trade-off between
interspecific displacement and disturbance risk in either ecosystems among species were positive. The
average intransitivity in transitions among zooplankton tended to be lower in estuary. The model
further indicates that higher intransitivities and species disturbance declines species diversity when
higher recruitment and interspecific replacement increase species diversity. This study will provide
knowledge about zooplankton diversity differences between river and estuary which can help to
undertake a proper management strategy in the Meghna river estuary | en_US |
