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Article Reference Opportunistic feeding habits of two African freshwater clupeid fishes: DNA metabarcoding unravels spatial differences in diet and microbiome, and identifies new prey taxa
The African Lake Tanganyika clupeids play an important role in the lake's ecosystem and have a high regional economic and nutritional value. Using DNA metabarcoding, we analysed the prey item composition and microbiome of these two clupeid species, Stolothrissa tanganicae and Limnothrissa miodon. We sequenced the mitochondrial COI region of the gut content for prey analysis and the 16S rRNA region of the hindgut content for microbiome analysis of 140 fish sampled at five locations across Lake Tanganyika. Our research confirmed previously reported prey items and discovered prey items that were not reported before, including the jellyfish Limnocnida tanganjicae. The hindgut of the fish harboured 15 bacterial phyla, with the most common being Firmicutes and Proteobacteria. The two clupeid species differed in diet, but not in microbiome. Further, the diet of S. tanganicae, but not its microbiome, varied on a spatial scale, whereas the microbiome, but not the diet, of L. miodon showed spatial variation. Our findings suggest that the Lake Tanganyika clupeids are opportunists, with a diet reflecting the local zooplankton community's composition. These results can serve as a useful reference for monitoring the health status of economically important fish stocks.
Located in Library / RBINS Staff Publications 2023
Article Reference Two celebrations and the Sustainable Development Goals
This year 2023, we have two milestones to celebrate for Hydrobiologia. Firstly, as Hydrobiologia was launched in March 1948, our journal is now 75 years young. Secondly, this is the first issue of volume 850. The second celebration requires a little nuance. Up to and including 2019, each of the 21 issues of Hydrobiologia was considered a separate volume and we ended 2019 with volume 846. Since 2020, Springer Nature standardized its journal portfolio in that one volume now covers a full year. For Hydrobiologia this means that we now have one volume and 21 issues annually. If the publication schedule would have remained unchanged, we would have started 2023 with volume 910 and we would have celebrated volume 1000 in 2027! Now we will have to wait 150 years to celebrate that event, in 2183 no less!
Located in Library / RBINS Staff Publications 2023
Article Reference Predicted changes in the distribution of Ostracoda (Crustacea) from river basins in the southern cone of South America, under two climate change scenarios
While many studies predict changes in the distribution of individual species as a result of climate change, few studies have assessed such changes at the community level for aquatic invertebrates. We used ostracods (bivalved micro-crustaceans) to assess the effects of climate change on regional species richness, (re-) distribution and community composition across the river basins of the Southern Cone of South America. Using a range of niche-based models, we present projections of changes in diversity components in the light of two scenarios on increased carbon emissions: the moderate-optimistic (RCP 4.5) and the pessimistic (RCP 8.5) scenarios from four climate models on 2050 and 2080 scenarios. Future projections show increase in the number of (mapped) cells with a richness up to five species as compared to present-day situations. La Plata basin (LPLA) presents the highest species loss, mainly in the Paraguay and Paraná rivers, while the species gain occurred mainly in the La Puna Region, North Chile-Pacific Coast and southern LPLA basins. Global change might impact ostracod communities even on a medium term (2050). Despite losses of local species in all future scenarios, a small portion of the LPLA was identified as a potential future climatic refugia for ostracod communities, while the distribution area in Patagonia was predicted to be extremely small for some ostracods at the southernmost parts of South Argentina-South Atlantic Coast and South Chile-Pacific Coast basins in both futures. These results indicate that non-model organisms can also contribute greatly to formulate evidence-based management plans for aquatic ecosystems under climate change scenarios.
Located in Library / RBINS Staff Publications 2023
Article Reference DNA taxonomy reveals high species diversity among the stygobiont genus Metastenasellus (Crustacea, Isopoda) in African groundwater
Located in Library / RBINS Staff Publications 2023
Article Reference Review of the lanternfly genus Pyrops of Thailand (Hemiptera: Fulgoridae) with notes and keys to species
Located in Library / RBINS Staff Publications 2023
Article Reference Sixteen issid planthopper species in one day in Dong Son-Ky Thuong Nature Reserve in North Vietnam: Eight new species, one new genus and additional new records (Hemiptera: Fulgoromorpha: Issidae)
Located in Library / RBINS Staff Publications 2023
Article Reference Pilsbrylia, a dextral-shelled door snail from South America (Gastropoda, Clausiliidae)
Located in Library / RBINS Staff Publications 2023
Article Reference State of knowledge of aquatic ecosystem and fisheries of the Lake Edward System, East Africa
Located in Library / RBINS Staff Publications 2023
Article Reference Mangrove Ecosystem Properties Regulate High Water Levels in a River Delta
Located in Library / RBINS Staff Publications 2023
Article Reference Effects of organic matter on the aggregation of anthropogenic microplastic particles in turbulent environments
Located in Library / RBINS Staff Publications 2023