Results 91 to 100 of about 447,945 (246)

Holocene vegetation dynamics of Grande Terre (Kerguelen Islands) inferred from sedimentary ancient DNA

Journal of Quaternary Science, EarlyView.
ABSTRACT While the Antarctic region has experienced significant climatic changes over the Holocene, few high‐resolution records have examined their effects on the local biota. In order to understand past ecological shifts and forecast future changes, it is important to obtain high‐resolution palaeoecological records from this region.
Xaali O'Reilly‐Berkeley, Aloïs Revéret, Youri Lammers, Maaike Zwier, Anne E. Bjune, Fabien Arnaud, Jostein Bakke, Sandra Nogué, Inger G. Alsos   +8 more
wiley   +1 more source

Influence of nontrophic interactions between benthic invertebrates on river sediment processes: a microcosm study [PDF]

, 2004
The main objective of this study was to measure the impact of benthic invertebrate diversity on river sediment processes. We quantified the effects of interactions between three taxa (asellids, chironomid larvae, and tubificid worms).
Mermillod-Blondin, Florian, Gérino, Magali, Sauvage, Sabine, Creuzé des Châtelliers, Michel   +3 more
core   +1 more source

Stable isotope analysis of freshwater gastropod carbonates from Swanscombe: Insights into climate stability and seasonality during MIS 11c

Journal of Quaternary Science, EarlyView.
ABSTRACT Stable isotope analyses of freshwater mollusc carbonate can record environmental conditions at the time of mineralisation, yet this technique remains underused in British Middle Pleistocene fluvial sequences, despite the abundance of fossil shell material in these deposits.
Jennifer E. Sherriff, Ian Candy, Adrian P. Palmer, Danielle C. Schreve, Tom S. White   +4 more
wiley   +1 more source

Influence of land-use on structural and functional macroinvertebrate composition communities associated on detritus in Subtropical Atlantic Forest streams

Acta Limnologica Brasiliensia
Aim Our aim in this study was to evaluate the effects of land use in drainage basins of the streams on the taxonomic and functional composition of aquatic invertebrate communities associated in leaf litter.
Luiz Ubiratan Hepp, Frederico Machado Urbim, Gabriela Tonello, Rafael Chaves Loureiro, Tanise Luisa Sausen, Rodrigo Fornel, Rozane Maria Restello   +6 more
doaj   +1 more source

Ngarrawa (mound spring) sediments as archives of Holocene environmental change in arid central Australia: Insights from Itrax XRF scanning

Journal of Quaternary Science, EarlyView.
ABSTRACT Central Australia's ngarrawa, or ‘mound springs’, are unique hydrological systems that serve as some of the only near‐permanent sources of water and continuous sediment deposition in Australia's arid interior. As such, they hold significant potential as palaeo‐climate and ‐environmental archives in a region where many aspects of past climate ...
Fletcher C. Nixon, Jonathan J. Tyler, Patricia S. Gadd, Quan Hua   +3 more
wiley   +1 more source

Water temperature governs organophosphate ester dynamics in the aquatic food chain of Poyang Lake

Environmental Science and Ecotechnology
Organophosphate esters (OPEs) are increasingly recognized as pervasive environmental contaminants, primarily from their extensive application in flame retardants and plasticizers.
Zhenfei Yan, Chenglian Feng, Yiping Xu, Jindong Wang, Nannan Huang, Xiaowei Jin, Fengchang Wu, Yingchen Bai   +7 more
doaj   +1 more source

Invertebrate prey contributions to juvenile Coho Salmon diet from riparian habitats along three Alaska streams: Implications for environmental change

Journal of Freshwater Ecology, 2019
Stream fish rely on a mix of terrestrial and aquatic prey sources. While the importance of terrestrial invertebrates as a food source for stream fish is well documented, the role of aquatic insects that emerge from the stream as winged adult insects ...
Jess Grunblatt, Benjamin E. Meyer, Mark S. Wipfli   +2 more
doaj   +1 more source

Is DNA metabarcoding an option for formaldehyde‐preserved zooplankton time series?

Limnology and Oceanography: Methods, EarlyView.
Abstract The recovery of amplifiable DNA from formaldehyde‐fixed (FF) zooplankton samples has long been considered problematic, but advances in degraded‐DNA retrieval have renewed interest in FF samples. To access the information stored in long‐term zooplankton time series, we evaluated methods for extracting amplifiable DNA from community samples ...
Aitor Albaina, Anders Lanzén, Irati Miguel, Fernando Rendo, María Santos   +4 more
wiley   +1 more source

Environmental diagnosis of metals in streams near sugarcane cultivation areas: current and historical analysis in the central region of the State of São Paulo

Anais da Academia Brasileira de Ciências
In Brazil, innumerable regions of native landcover have been removed and replaced by agricultural cultivation, especially of sugarcane. In this culture, the application of fertilizers containing metals has caused impacts on the water resources causing ...
JULIANO J. CORBI, CAMILA G. COSTA, GUILHERME R. GORNI, VANESSA COLOMBO, LEONARDO RIOS   +4 more
doaj   +1 more source

Assessment of Aquatic invertebrates and Water Quality of River Katsina-Ala at Kwanta-Sule, Benue State, Nigeria

The present study focused on aquatic invertebrates and water quality of River Katsina-Ala at Kwata-Sule, Guma Local Government Area of Benue State, Nigeria.
Jeiyol , Saater Emmanuel, Gbaior , Tivfa Samuel, Injoko , Hemen Samuel, Gbaior , Msendoo Esther   +3 more
core   +1 more source