A Brief Note on Molluscan Diversity From Water Bodies of Amravati MS India

Wagh, G. A.; Ha, Qureshi; Patil, S.G.

doi:10.21786/bbrc/12.3/39

Cited by 2 publications

(2 citation statements)

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“…This may be explained partially by differing microhabitat preferences between the two species, although the abiotic variables we measured showed no significant associations with either species. Parreysia is generally less widespread than Lamellidens (Wagh et al, 2019) and is found at lower densities (Dey et al, 2016; Sarang & Sharma, 2014); it may also have lower tolerance for nutrient‐enriched and low‐oxygen habitats (Nesemann et al, 2007). Interspecific competition between the two species, and competitive exclusion of Parreysia by Lamellidens , may also play a role.…”

Section: Discussionmentioning

confidence: 99%

“…To test the effects of mussel presence and density on macroinvertebrate community composition, and the influence of mussel species identity on these effects, we studied benthic communities from Dhanmondi Lake in Dhaka, Bangladesh, which include the mussel species Lamellidens marginalis (Lamarck, 1819) and Parreysia caerulea (Lea, 1831). Lamellidens is a more widespread species (Wagh et al, 2019) and tends to be found at higher abundance than Parreysia (Dey et al, 2016; Sarang & Sharma, 2014). Lamellidens generally also grows to a larger size than Parreysia , with average lengths of 78 and 47 mm, respectively (Siddiqui et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Functional non‐equivalence in ecosystem engineers? Different freshwater mussels (Bivalvia: Unionidae) are associated with different macroinvertebrate communities in a subtropical lake

2023

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Freshwater mussels (Bivalvia: Unionidae) are often described as ecosystem engineers, with the capacity to alter abiotic habitats; this can facilitate certain macroinvertebrate taxa, increasing biodiversity and potentially altering community composition. Mussel species are often implicitly considered to be broad ecological equivalents, with similar impacts on abiotic environments and benthic communities. This assumption of redundancy is important in conservation approaches that aim to preserve ecosystem functioning, rather than species identity. We tested this assumption of equivalence in two species of subtropical freshwater mussels, Lamellidens marginalis and Parreysia caerulea, studying the associations between these mussel species and macroinvertebrate communities. We measured mussel density and abundance of macroinvertebrates, identified to family level, at 50 sites within Dhanmondi Lake, a heavily polluted sub‐tropical urban lake in Dhaka, Bangladesh. We investigated the associations of mussel density on different macroinvertebrate families, which we further classified into functional feeding groups (predators, scrapers, collectors and shredders). We found that densities of the two mussel species were negatively correlated in the 1–3‐m nearshore zone; average density of Lamellidens was 46.4 ± SE 3.6 individuals/0.25 m2, and average density of Parreysia was 6.4 ± SE 1.4 individuals/0.25 m2. In total, 2319 Lamellidens and 320 Parreysia specimens were recorded. Sites containing higher densities of Lamellidens had greater similarity in macroinvertebrate community composition, while there was no effect for Parreysia. Particular macroinvertebrate families and functional feeding groups were also associated with mussels; the majority of significant associations were with Lamellidens but not Parreysia. The clearest associations were with predators and scrapers, which increased in abundance with Lamellidens density. This provides support for a possible role for mussels in structuring freshwater invertebrate communities and emphasises the importance of species identity in these effects, with one possible keystone species (Lamellidens) largely accounting for mussel–invertebrate associations. While microhabitat variables (shading and sediment type) were poor predictors of abundance in any invertebrate taxa (including mussels), manipulative studies are needed to disentangle the direct effects of mussels from the role of overlapping habitat preference between mussels and other invertebrates. Our results highlight the importance of species identity in patterns of community composition, particularly for ecosystem engineer species. We also reinforce the need to test the assumption of ecological redundancy within communities.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Functional non‐equivalence in ecosystem engineers? Different freshwater mussels (Bivalvia: Unionidae) are associated with different macroinvertebrate communities in a subtropical lake

2023

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Spatial and temporal variation in the diversity of malacofauna from Aripal stream of Kashmir Himalaya, India

Mir

Bakhtiyar

2022

J. Threat. Taxa

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This paper presents the spatial and temporal variation in the diversity of malacofauna in relation to the water chemistry of the Aripal stream of Kashmir Himalaya. A total of 12 species were reported which belong to four families, Lymnaeidae, Physidae, Planorbidae, and Bithyniidae from class Gastropoda, and two families, Cyrenidae and Pisidiidae from class Bivalvia. The family Planorbidae contributed 34% to the total annual molluscan population followed by Lymnaeidae (28%) and Bithyniidae (18%). During the collection, Gyraulus sp., Planorbis sp., and Bithynia tentaculata were prevalent at all sites, with predominance of Bithynia tentaculata. Species richness and abundance were observed maximum at site A3 (down-stream) and minimum at site A1 (up-stream) while in the case of temporal variation, species richness and abundance were maximum in summer and minimum in winter. Shannon-Wiener index, Simpson index, Margalef index, and Pielou evenness index were used to calculate the diversity, dominance, richness, and evenness of molluscan species, respectively. Physico-chemical parameters revealed a non-significant spatial variation (P >0.05) except pH, total hardness, and alkalinity while a significant temporal variation (P <0.05) was observed in the physico-chemical parameters except dissolved oxygen. A significant positive correlation was seen between the molluscan species and total hardness. In the present study, the stone mining, channel morphology of stream, habitat heterogeneity, and physico-chemical parameters were also found to promote the spatial and temporal diversity of malacofauna.

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A Brief Note on Molluscan Diversity From Water Bodies of Amravati MS India

Cited by 2 publications

References 1 publication

Functional non‐equivalence in ecosystem engineers? Different freshwater mussels (Bivalvia: Unionidae) are associated with different macroinvertebrate communities in a subtropical lake

Functional non‐equivalence in ecosystem engineers? Different freshwater mussels (Bivalvia: Unionidae) are associated with different macroinvertebrate communities in a subtropical lake

Spatial and temporal variation in the diversity of malacofauna from Aripal stream of Kashmir Himalaya, India

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