scholarly journals Identifying zooplankton community changes between shallow and upper-mesophotic reefs on the Mesoamerican Barrier Reef, Caribbean

2016 ◽  
Author(s):  
Dominic A Andradi-Brown ◽  
Catherine Head ◽  
Dan A Exton ◽  
Christina L Hunt ◽  
Alicia Hendrix ◽  
...  
Keyword(s):  
Zooplankton Community ◽  
Barrier Reef ◽  
Depth Gradient ◽  
Light Traps ◽  
Mesophotic Coral Ecosystems ◽  
Community Shifts ◽  
Mesoamerican Barrier Reef ◽  
Community Changes ◽  
Taxonomic Groups ◽  
Zooplankton Communities

Mesophotic coral ecosystems (MCEs, reefs 30 -150m) are understudied, yet the limited research conducted has been biased towards large sessile taxa, such as scleractinian corals and sponges, or mobile taxa such as fish. Here we investigate zooplankton communities on shallow reefs and MCEs around Utila, on the southern Mesoamerican Barrier Reef using planktonic light traps. Zooplankton samples were sorted into broad taxonomic groups. Our results indicate similar taxonomic zooplankton richness and overall biomass between shallow reefs and MCEs, but that abundance of larger bodied (>2 mm) zooplanktonic groups, including decapod crab zoea, mysid shrimps and peracarid crustaceans was higher on MCEs than shallow reefs. Our findings highlight the important of considering zooplankton when identifying broader reef community shifts across the shallow reef to MCE depth gradient.

scholarly journals Identifying zooplankton community changes between shallow and upper-mesophotic reefs on the Mesoamerican Barrier Reef, Caribbean

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e2853 ◽  
Author(s):  
Dominic A. Andradi-Brown ◽  
Catherine E. I. Head ◽  
Dan A. Exton ◽  
Christina L. Hunt ◽  
Alicia Hendrix ◽  
...  
Keyword(s):  
Zooplankton Community ◽  
Barrier Reef ◽  
Depth Gradient ◽  
Light Traps ◽  
Mesophotic Coral Ecosystems ◽  
Community Shifts ◽  
Mesoamerican Barrier Reef ◽  
Community Changes ◽  
Taxonomic Groups ◽  
Zooplankton Communities

Mesophotic coral ecosystems (MCEs, reefs 30–150 m) are understudied, yet the limited research conducted has been biased towards large sessile taxa, such as scleractinian corals and sponges, or mobile taxa such as fishes. Here we investigate zooplankton communities on shallow reefs and MCEs around Utila on the southern Mesoamerican Barrier Reef using planktonic light traps. Zooplankton samples were sorted into broad taxonomic groups. Our results indicate similar taxonomic zooplankton richness and overall biomass between shallow reefs and MCEs. However, the abundance of larger bodied (>2 mm) zooplanktonic groups, including decapod crab zoea, mysid shrimps and peracarid crustaceans, was higher on MCEs than shallow reefs. Our findings highlight the importance of considering zooplankton when identifying broader reef community shifts across the shallow reef to MCE depth gradient.

scholarly journals Identifying zooplankton community changes between shallow and upper-mesophotic reefs on the Mesoamerican Barrier Reef, Caribbean

2016 ◽  
Author(s):  
Dominic A Andradi-Brown ◽  
Catherine Head ◽  
Dan A Exton ◽  
Christina L Hunt ◽  
Alicia Hendrix ◽  
...  
Keyword(s):  
Zooplankton Community ◽  
Barrier Reef ◽  
Depth Gradient ◽  
Light Traps ◽  
Mesophotic Coral Ecosystems ◽  
Community Shifts ◽  
Mesoamerican Barrier Reef ◽  
Community Changes ◽  
Taxonomic Groups ◽  
Zooplankton Communities

Mesophotic coral ecosystems (MCEs, reefs 30 -150m) are understudied, yet the limited research conducted has been biased towards large sessile taxa, such as scleractinian corals and sponges, or mobile taxa such as fish. Here we investigate zooplankton communities on shallow reefs and MCEs around Utila, on the southern Mesoamerican Barrier Reef using planktonic light traps. Zooplankton samples were sorted into broad taxonomic groups. Our results indicate similar taxonomic zooplankton richness and overall biomass between shallow reefs and MCEs, but that abundance of larger bodied (>2 mm) zooplanktonic groups, including decapod crab zoea, mysid shrimps and peracarid crustaceans was higher on MCEs than shallow reefs. Our findings highlight the important of considering zooplankton when identifying broader reef community shifts across the shallow reef to MCE depth gradient.

Zooplankton as Water Quality Indicator in Shallow Lakes

2019 ◽  
Vol 16 (11) ◽  
pp. 4486-4490
Author(s):  
Olga Yurjevna Derevenskaya ◽  
Evgenia Sergeevna Prytkova ◽  
Elena Nikolaevna Unkovskaya
Keyword(s):  
Shallow Lakes ◽  
Trophic Status ◽  
Zooplankton Community ◽  
Biosphere Reserve ◽  
Physicochemical Studies ◽  
Taxonomic Groups ◽  
Zooplankton Communities ◽  
Quantitative Indicators ◽  
Individual Mass

Long-term studies (1998–2018) of shallow lakes Krugloe and Krutoe (Russia) were carried out. The trophic status of the lakes was estimated using physicochemical parameters of water and the indicators of zooplankton. Physicochemical studies of Krugloe and Krutoe lake water make it possible to classify these reservoirs as eutrophic according to their trophic status. The lakes are characterized by low water transparency, a high content of organic substances in water, the “blooming” of water is observed periodically, accompanied by the increase of pH to 8–9 units. The zooplankton communities of Krugloe and Krutoe lakes are characterized by relatively low species richness, the dominance of a small number of species, and the predominance of species that are indicators of eutrophic waters. Quantitative indicators of zooplankton are characterized by significant fluctuations in values over the years, the prevalence of rotifers. They showed that zooplankton community is a good indicator of the trophic state of lakes. Such indicators of zooplankton communities as the composition of dominant species, their number, the presence of indicator species, the quantitative indicators of zooplankton and individual taxonomic groups, and the average individual mass of the zooplankton can be used to characterize the trophic status of lakes. They can be recommended for use during monitoring of the lake condition in the Volga-Kama State Natural Biosphere Reserve.

Changes in the crustacean communities of Lakes Michigan, Huron, and Erie following the invasion of the predatory cladoceran Bythotrephes longimanus

2004 ◽  
Vol 61 (11) ◽  
pp. 2111-2125 ◽  
Author(s):  
Richard P Barbiero ◽  
Marc L Tuchman
Keyword(s):  
Zooplankton Community ◽  
Crustacean Zooplankton ◽  
Bythotrephes Longimanus ◽  
Zooplankton Community Structure ◽  
Cladoceran Species ◽  
Invertebrate Predators ◽  
Predatory Cladoceran ◽  
Leptodora Kindti ◽  
Escape Responses ◽  
Zooplankton Communities

The crustacean zooplankton communities in Lakes Michigan and Huron and the central and eastern basins of Lake Erie have shown substantial, persistent changes since the invasion of the predatory cladoceran Bythotrephes in the mid-1980s. A number of cladoceran species have declined dramatically since the invasion, including Eubosmina coregoni, Holopedium gibberum, Daphnia retrocurva, Daphnia pulicaria, and Leptodora kindti, and overall species richness has decreased as a result. Copepods have been relatively unaffected, with the notable exception of Meso cyclops edax, which has virtually disappeared from the lakes. These species shifts have for the most part been consistent and equally pronounced across all three lakes. Responses of crustacean species to the Bythotrephes invasion do not appear to be solely a consequence of size, and it is likely that other factors, e.g., morphology, vertical distribution, or escape responses, are important determinants of vulnerability to predation. Our results indicate that invertebrate predators in general, and invasive ones in particular, can have pronounced, lasting effects on zooplankton community structure.

scholarly journals Metabarcoding reveals different zooplankton communities in northern and southern areas of the North Sea

2020 ◽  
Author(s):  
Jan Niklas Macher ◽  
Berry B. van der Hoorn ◽  
Katja T. C. A. Peijnenburg ◽  
Lodewijk van Walraven ◽  
Willem Renema
Keyword(s):  
North Sea ◽  
Zooplankton Community ◽  
Taxonomic Diversity ◽  
Molecular Techniques ◽  
Trophic Levels ◽  
List Type ◽  
The North ◽  
Shelf Sea ◽  
The North Sea ◽  
Zooplankton Communities

AbstractZooplankton are key players in marine ecosystems, linking primary production to higher trophic levels. The high abundance and high taxonomic diversity renders zooplankton ideal for biodiversity monitoring. However, taxonomic identification of the zooplankton assemblage is challenging due to its high diversity, subtle morphological differences and the presence of many meroplanktonic species, especially in coastal seas. Molecular techniques such as metabarcoding can help with rapid processing and identification of taxa in complex samples, and are therefore promising tools for identifying zooplankton communities. In this study, we applied metabarcoding of the mitochondrial cytochrome c oxidase I gene to zooplankton samples collected along a latitudinal transect in the North Sea, a shelf sea of the Atlantic Ocean. Northern regions of the North Sea are influenced by inflow of oceanic Atlantic waters, whereas the southern parts are characterised by more coastal waters. Our metabarcoding results indicated strong differences in zooplankton community composition between northern and southern areas of the North Sea, particularly in the classes Copepoda, Actinopterygii (ray-finned fishes) and Polychaeta. We compared these results to the known distributions of species reported in previous studies, and by comparing the abundance of copepods to data obtained from the Continuous Plankton Recorder (CPR). We found that our metabarcoding results are mostly congruent with the reported distribution and abundance patterns of zooplankton species in the North Sea. Our results highlight the power of metabarcoding to rapidly assess complex zooplankton samples, and we suggest that the technique could be used in future monitoring campaigns and biodiversity assessments.HighlightsZooplankton communities are different in northern and southern areas of the North SeaMetabarcoding results are consistent with known species distributions and abundanceMetabarcoding allows for fast identification of meroplanktonic species

Environmental drivers of a decline in a coastal zooplankton community

2021 ◽  
Author(s):  
Seòna R Wells ◽  
Eileen Bresnan ◽  
Kathryn Cook ◽  
Dafne Eerkes-Medrano ◽  
Margarita Machairopoulou ◽  
...  
Keyword(s):  
Zooplankton Community ◽  
Water Masses ◽  
Environmental Drivers ◽  
High Temporal Resolution ◽  
Monitoring Site ◽  
Zooplankton Abundance ◽  
Offshore Water ◽  
Additive Mixed Models ◽  
Zooplankton Communities

Abstract Major changes in North Atlantic zooplankton communities in recent decades have been linked to climate change but the roles of environmental drivers are often complex. High temporal resolution data is required to disentangle the natural seasonal drivers from additional sources of variability in highly heterogeneous marine systems. Here, physical and plankton abundance data spanning 2003–2017 from a weekly long-term monitoring site on the west coast of Scotland were used to investigate the cause of an increasing decline to approximately -80± 5% in annual average total zooplankton abundance from 2011 to 2017. Generalized additive mixed models (GAMMs), with an autoregressive correlation structure, were used to examine seasonal and inter-annual trends in zooplankton abundance and their relationship with environmental variables. Substantial declines were detected across all dominant taxa, with ∼ 30–70% of the declines in abundance explained by a concurrent negative trend in salinity, alongside the seasonal cycle, with the additional significance of food availability found for some taxa. Temperature was found to drive seasonal variation but not the long-term trends in the zooplankton community. The reduction in salinity had the largest effect on several important taxa. Salinity changes could partly be explained by locally higher freshwater run-off driven by precipitation as well as potential links to changes in offshore water masses. The results highlight that changes in salinity, caused by either freshwater input (expected from climate predictions) or fresher offshore water masses, may adversely impact coastal zooplankton communities and the predators that depend on them.

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