The foundation for any ecological study and for the effective management of biodiversity in natural systems requires knowing what species are present in an ecosystem. We assessed fish communities in a stream using two methods, depletion-based electrofishing and environmental DNA metabarcoding (eDNA) from water samples, to test the hypothesis that eDNA provides an alternative means of determining species richness and species identities for a natural ecosystem. In a northern Indiana stream, electrofishing yielded a direct estimate of 12 species and a mean estimated richness (Chao II estimator) of 16.6 species with a 95% confidence interval from 12.8 to 42.2. eDNA sampling detected an additional four species, congruent with the mean Chao II estimate from electrofishing. This increased detection rate for fish species between methods suggests that eDNA sampling can enhance estimation of fish fauna in flowing waters while having minimal sampling impacts on fish and their habitat. Modern genetic approaches therefore have the potential to transform our ability to build a more complete list of species for ecological investigations and inform management of aquatic ecosystems.
Download full-text PDF |
Source |
---|---|
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4972244 | PMC |
http://dx.doi.org/10.1002/ece3.2186 | DOI Listing |
Environ Sci Pollut Res Int
January 2025
South African Institute for Aquatic Biodiversity, Makhanda, 6140, South Africa.
Riverine physical and chemical characteristics are influencing ecosystem integrity while shaping and impacting species richness and diversity. Changes in these factors could potentially influence community structuring through competition, predation and localised species extinctions. In this study, eight sampling sites over multiple seasons were assessed along the streams draining the City of Nelspruit, South Africa, to examine river health based on water and sediment quality, while using macroinvertebrates as bioindicators for pollution.
View Article and Find Full Text PDFJ Environ Manage
December 2024
National Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China. Electronic address:
The kitchen waste and garden waste (KW-GW) co-composting system provides an effective method for recycling these two types of municipal solid waste; however, further improvements are needed to enhance bioconversion performance. This study investigates a novel composting additive, calcium polypeptides (CPPs), derived from waste animal and plant proteins, which can enhance the bioconversion capacity of biomass in the KW-GW co-composting system. As a pH regulator and an available nitrogen source, CPPs significantly increase the compost matrix pH, prolong the thermophilic phase, and reduce emissions of exhaust gases such as CH, NO, NH, and HS by 52.
View Article and Find Full Text PDFMicrobiome Res Rep
September 2024
State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, Jiangsu, China.
Accumulating evidence highlights the crucial role of the "gut-brain axis" and emphasizes the potential of dietary interventions to improve brain health through this pathway. This study assesses the effects of the probiotic CCFM6432 on mood, sleep, and gastrointestinal function in patients with depressive disorder. This clinical trial is a randomized, placebo-controlled study (Registration: ChiCTR2300071025).
View Article and Find Full Text PDFPhytoKeys
December 2024
Department of Biology and Chemistry, Changwon National University, Changwon 51140, Republic of Korea Changwon National University Changwon Republic of Korea.
The genus L., belonging to the Liliaceae family, has significant economic, horticultural, and ecological importance and is culturally revered in various regions worldwide. The total number of species, including 90-120 taxa, varies based on different sources.
View Article and Find Full Text PDFJ Environ Manage
December 2024
Department of Applied Biology, Miguel Hernández University of Elche, Elche, Spain; Centro de Investigación e Innovación Agroalimentaria y Agroambiental (CIAGRO-UMH), Orihuela, Spain.
Offshore wind energy is experiencing accelerated growth worldwide to support global net zero ambitions. To ensure responsible development and to protect the natural environment, it is essential to understand and mitigate the potential impacts on wildlife, particularly on seabirds and marine mammals. However, fully understanding the effects of offshore wind energy production requires characterising its global geographic occurrence and its potential overlap with marine species.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!