Environmental influences on zooplankton diversity in the Kavaratti lagoon and offshore, Lakshadweep Archipelago, India

Antony, Sibin; Ajayan, Anila P.; Dev, Vinu Vasudevan; Mahadevan, Harsha; Kaliraj, S.; Krishnan, K. Anoop

doi:10.1016/j.rsma.2020.101330

Cited by 9 publications

(8 citation statements)

References 51 publications

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“…The highest abundance of zooplankton was 346.14 ± 7.22 ind./L, and the lowest was 211.52 ± 11.01 ind./L in the homestead ponds of the study area. A similar abundance of zooplankton was found by [50], which was relatively lower than that of the other studies [41,42,46,47]; this may be due to differences in the ecosystems as well as lack of feeding and fertilization in the studied homestead ponds [38]. The mean abundance of the zooplankton was found to be higher (301.19 ± 40.55 ind./L) in February and lower (293.02 ± 21.12 ind./L) in December in the present study.…”

Section: Zooplankton Abundance and Diversitysupporting

confidence: 81%

“…Bosmina sp and Mesocyclops sp, indicates a high amount of suspended material in the water body. The zooplankton communities identified from Lakshadweep Archipelago, India (56 species, 7 groups) [41], from a seagrass habitat (45 species, 13 groups) [42] and a man-made lake (27 species, 3 groups) in Malaysia [43], from the maritime channel systems in the Bay of Bengal (32 species, 11 groups) [1], and from a salt marsh estuary, Cox's Bazar (33 species, 11 groups), in Bangladesh [44] were far more numerous than those in the present study, which can be attributed to diversified ecosystems. However, several previous studies have recorded a similar number of zooplankton species in brood ponds (11 genera, 6 groups) [45], Kaptai Lake (10 genera, 3 groups) [46], and aquaculture ponds (9 genera, 4 groups) [47].…”

Section: Zooplankton Communitiesmentioning

confidence: 99%

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Diversity and Community Structure of Zooplankton in Homestead Ponds of a Tropical Coastal Area

et al. 2022

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As an intermediary connection between primary producers and higher trophic levels, zooplankton are an important component of the aquatic food chain, contributing significantly to aquatic biological productivity. This study describes the zooplankton diversity and community structure, as well as their relationships with ecological factors, in homestead ponds of a coastal district along the northern Bay of Bengal region. Significant differences (p < 0.05) were detected in the mean values of temperature, pH, DO, TDS, transparency, and phosphates from the ponds during December 2020, but no significant differences were found in the nitrate levels. However, no significant variances in the ecological parameters between months were found due to the study taking place in the same season. Sixteen zooplankton species, representing four groups, were found in the study area, with the highest mean abundance of 301.19 ± 40.55 ind./L recorded in February 2021 and the lowest of 293.02 ± 21.13 ind./L recorded in December 2020. The diversity (H’), evenness (e), richness (J), and dominance (D) ranged from 2.49 to 2.12, from 0.93 to 0.84, from 2.05 to 1.56, and from 0.13 to 0.09, respectively. Based on the SIMPER analysis, Diaptomus gracilis and Brachionus calyciflorus were found to be significant contributors (>10%) to the zooplankton community structure in different months. The ANOSIM results revealed that 10 species of zooplankton were significant contributors based on their average dissimilarity. The canonical correspondence analysis (CCA) identified that pH, transparency, nitrates, and phosphates have a significant impact on the abundance of zooplankton species in the homestead ponds in the study area.

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Section: Zooplankton Abundance and Diversitysupporting

confidence: 81%

Section: Zooplankton Communitiesmentioning

confidence: 99%

Diversity and Community Structure of Zooplankton in Homestead Ponds of a Tropical Coastal Area

et al. 2022

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“…Notably, as measurements from two neighboring offshore sites indicated lower nutrient concentration ranges of 1.99 to 5.82 mmol NO − 3 L -1 , 0.07 to 0.21 mmol PO 3− 4 L -1 , and 2.50 to 4.40 mmol Si L -1 , Antony et al (2020) concluded that anthropogenic nutrient enrichment of Kavaratti lagoon waters was now evident. Whilst the observations reported by Antony et al (2020) do appear substantially higher than those recorded from this lagoon previously (e.g. (Karati et al, 2017) (<0.5 mmol NO − 3 L -1 ) they remain broadly comparable to concentrations reported by Kumaresan et al (2018) for the surrounding Lakshadweep Sea such that high variability in lagoonal nutrient concentrations due to water exchange cannot be fully ruled out.…”

Section: Lakshadweep Islandssupporting

confidence: 77%

“…Citing studies from the 1970's, Balasubramanian and Khan (2001) inferred limited seasonality and low nutrient concentrations of<0.3 mmol NO − 3 L -1 and<0.4 mmol PO 3− 4 L -1 both within the lagoon and in the surrounding open sea. More recently, concentrations of 1.95 to 8.96 mmol NO − 3 L -1 , 0.12 to 0.33 mmol PO 3− 4 L -1 , and 2.47 to 5.93 mmol Si L -1 have been reported from within the extensive lagoon area (Antony et al, 2020). Notably, as measurements from two neighboring offshore sites indicated lower nutrient concentration ranges of 1.99 to 5.82 mmol NO − 3 L -1 , 0.07 to 0.21 mmol PO 3− 4 L -1 , and 2.50 to 4.40 mmol Si L -1 , Antony et al (2020) concluded that anthropogenic nutrient enrichment of Kavaratti lagoon waters was now evident.…”

Section: Lakshadweep Islandsmentioning

confidence: 99%

Anthropogenic nitrogen pollution threats and challenges to the health of South Asian coral reefs

et al. 2023

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Nitrogen pollution is a widespread and growing problem in the coastal waters of South Asia yet the ecological impacts on the region’s coral ecosystems are currently poorly known and understood. South Asia hosts just under 7% of global coral reef coverage but has experienced significant and widespread coral loss in recent decades. The extent to which this coral ecosystem decline at the regional scale can be attributed to the multiple threats posed by nitrogen pollution has been largely overlooked in the literature. Here, we assess the evidence for nitrogen pollution impacts on corals in the central Indian Ocean waters of India, Sri Lanka and the Maldives. We find that there is currently limited evidence with which to clearly demonstrate widespread impacts on coral reefs from nitrogen pollution, including from its interactions with other stressors such as seawater warming. However, this does not prove there are no significant impacts, but rather it reflects the paucity of appropriate observations and related understanding of the range of potential impacts of nitrogen pollution at individual, species and ecosystem levels. This situation presents significant research, management and conservation challenges given the wide acceptance that such pollution is problematic. Following from this, we recommend more systematic collection and sharing of robust observations, modelling and experimentation to provide the baseline on which to base prescient pollution control action.

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“…17,18,[32][33][34] The Lakshadweep Archipelago in India (56 species, 7 groups) and a man-made lake in Malaysia (27 species, 3 groups) had higher zooplankton communities than those in the present study, which can be attributed to diverse habitats. 35,36 The variation in zooplankton genera in the present study compared to other studies could arise from differences in the nutrient status, pond bottom, and embankment soil quality, meteorological factors, and the massive growth of phytoplankton in pond water. The presence of various zooplankton groups predicted and determined the status of water bodies.…”

Section: Occurrence and Abundance Of Zooplanktonmentioning

confidence: 47%

Seasonal dynamics of zooplankton in a eutrophic fish pond of Bangladesh in relation to environmental factors

Khan,

Sultana,

Hena

et al. 2023

JAMB

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Zooplankton is crucial for transmitting energy from primary producers to higher trophic levels. A study was done in a Bangladesh eutrophic fish pond to know zooplankton's seasonal dynamics in relation to environmental factors. There were 11 different zooplankton genera, which belong to three major classes: Copepoda, Rotifera, and Cladocera. Peak abundance of zooplankton was found in the spring and winter, respectively. Cluster analysis clearly indicated zooplankton abundance during the spring and winter. Rotifera was the main dominant group in the total zooplankton population. Copepoda and Cladocera had a lower abundance than those of Rotifera. During the study period, environmental factors were observed monthly. The total zooplankton abundance showed a positive correlation only with pH and a negative correlation with transparency, dissolved oxygen, phosphates, nitrates, and temperature during Pearson’s correlation coefficient analysis. The canonical correspondence analysis also indicated that pH, transparency, and temperature significantly affect the abundance of zooplankton groups. Therefore, further research on the influence of environmental factors on different species of zooplankton is strongly suggested for achieving sustainable fish production from eutrophic fish ponds.

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Environmental influences on zooplankton diversity in the Kavaratti lagoon and offshore, Lakshadweep Archipelago, India

Cited by 9 publications

References 51 publications

Diversity and Community Structure of Zooplankton in Homestead Ponds of a Tropical Coastal Area

Diversity and Community Structure of Zooplankton in Homestead Ponds of a Tropical Coastal Area

Anthropogenic nitrogen pollution threats and challenges to the health of South Asian coral reefs

Seasonal dynamics of zooplankton in a eutrophic fish pond of Bangladesh in relation to environmental factors

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