Integrated trophic position decreases in more diverse communities of stream food webs

Scientific Reports
Naoto F IshikawaNoboru Okuda

Abstract

The relationship between biodiversity and ecosystem functioning is an important theme in environmental sciences. We propose a new index for configuration of the biomass pyramid in an ecosystem, named integrated trophic position (iTP). The iTP is defined as a sum of trophic positions (i.e. the average number of steps involved in biomass transfer) of all the animals in a food web integrated by their individual biomass. The observed iTP for stream macroinvertebrates ranged from 2.39 to 2.79 and was negatively correlated with the species density and the Shannon-Wiener diversity index of the local community. The results indicate a lower efficiency of biomass transfer in more diverse communities, which may be explained by the variance in edibility hypothesis and/or the trophic omnivory hypothesis. We found a negative effect of biodiversity on ecosystem functioning.

References

Nov 13, 1987·Science·F Briand, J E Cohen
Feb 18, 1998·Science·D PaulyF Torres
Nov 5, 1999·Trends in Ecology & Evolution·M L PaceJ F Kitchell
Jul 13, 2000·Nature·D M PostN G Hairston
Mar 4, 1997·Proceedings of the National Academy of Sciences of the United States of America·D TilmanK T Thomson
Jan 25, 2002·Nature·Bradley J CardinaleScott L Collins
Mar 18, 2004·The American Naturalist·Richard J Williams, Neo D Martinez
May 28, 2004·Nature·Deborah L Finke, Robert F Denno
Apr 9, 2005·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Daniel Pauly, Reg Watson
May 15, 2007·Ecology Letters·J Emmett DuffyMichel Loreau
May 1, 2005·Ecology Letters·K S McCannJ Umbanhowar
Jun 16, 2012·PloS One·Hideyuki DoiHelmut Hillebrand
Feb 13, 2016·Proceedings. Biological Sciences·Carmen García-ComasChih-Hao Hsieh

❮ Previous
Next ❯

Citations


❮ Previous
Next ❯

Methods Mentioned

BETA
deamination

Software Mentioned

CSIA
AA

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

AAOHN Journal : Official Journal of the American Association of Occupational Health Nurses
Kathy Sitzman
International Journal of Dental Hygiene
Maria Perno Goldie
© 2022 Meta ULC. All rights reserved