scholarly journals Magnesium and zinc stable isotopes as a new tool to understand Mg and Zn sources in stream food webs

Ecosphere ◽  
2020 ◽  
Vol 11 (8) ◽  
Author(s):  
Kai Nils Nitzsche ◽  
Ki‐Cheol Shin ◽  
Yoshikazu Kato ◽  
Hiromitsu Kamauchi ◽  
Shotaro Takano ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Food Webs ◽  
Stream Food Webs

Stable Isotopes in Stream Food Webs

2017 ◽  
pp. 3-20 ◽  
Author(s):  
Anne E. Hershey ◽  
Robert M. Northington ◽  
Jacques C. Finlay ◽  
Bruce J. Peterson
Keyword(s):  
Stable Isotopes ◽  
Food Webs ◽  
Stream Food Webs

Tracing energy flow in stream food webs using stable isotopes of hydrogen

2010 ◽  
Vol 55 (5) ◽  
pp. 941-951 ◽  
Author(s):  
JACQUES C. FINLAY ◽  
RICHARD R. DOUCETT ◽  
CAMILLE McNEELY
Keyword(s):  
Stable Isotopes ◽  
Food Webs ◽  
Energy Flow ◽  
Stream Food Webs

scholarly journals Stable isotopes of a terrestrial amphibian illustrate fertilizer-related nitrogen enrichment of food webs in agricultural habitats

2021 ◽  
Vol 319 ◽  
pp. 107553
Author(s):  
Matthias Renoirt ◽  
Frédéric Angelier ◽  
Marion Cheron ◽  
Paco Bustamante ◽  
Yves Cherel ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Food Webs ◽  
Nitrogen Enrichment

Functional significance of crayfish in stream food webs: roles of omnivory, substrate heterogeneity and sex

Oikos ◽  
2002 ◽  
Vol 98 (3) ◽  
pp. 512-522 ◽  
Author(s):  
Nisikawa Usio ◽  
Colin R. Townsend
Keyword(s):  
Food Webs ◽  
Functional Significance ◽  
Substrate Heterogeneity ◽  
Stream Food Webs

scholarly journals ‘Taking Fishers’ Knowledge to the Lab’: An Interdisciplinary Approach to Understand Fish Trophic Relationships in the Brazilian Amazon

2021 ◽  
Vol 9 ◽  
Author(s):  
Paula Evelyn Rubira Pereyra ◽  
Gustavo Hallwass ◽  
Mark Poesch ◽  
Renato Azevedo Matias Silvano
Keyword(s):  
Stable Isotopes ◽  
Food Webs ◽  
Fish Species ◽  
Trophic Interactions ◽  
Brazilian Amazon ◽  
Trophic Levels ◽  
Trophic Relationships ◽  
Ecological Knowledge ◽  
Data Limitations ◽  
Combining Data

Trophic levels can be applied to describe the ecological role of organisms in food webs and assess changes in ecosystems. Stable isotopes analysis can assist in the understanding of trophic interactions and use of food resources by aquatic organisms. The local ecological knowledge (LEK) of fishers can be an alternative to advance understanding about fish trophic interactions and to construct aquatic food webs, especially in regions lacking research capacity. The objectives of this study are: to calculate the trophic levels of six fish species important to fishing by combining data from stable isotopes analysis and fishers’ LEK in two clear water rivers (Tapajós and Tocantins) in the Brazilian Amazon; to compare the trophic levels of these fish between the two methods (stable isotopes analysis and LEK) and the two rivers; and to develop diagrams representing the trophic webs of the main fish prey and predators based on fisher’s LEK. The fish species studied were Pescada (Plagioscion squamosissimus), Tucunaré (Cichla pinima), Piranha (Serrasalmus rhombeus), Aracu (Leporinus fasciatus), Charuto (Hemiodus unimaculatus), and Jaraqui (Semaprochilodus spp.). A total of 98 interviews and 63 samples for stable isotopes analysis were carried out in both rivers. The average fish trophic levels did not differ between the stable isotopes analysis and the LEK in the Tapajós, nor in the Tocantins Rivers. The overall trophic level of the studied fish species obtained through the LEK did not differ from data obtained through the stable isotopes analysis in both rivers, except for the Aracu in the Tapajós River. The main food items consumed by the fish according to fishers’ LEK did agree with fish diets as described in the biological literature. Fishers provided useful information on fish predators and feeding habits of endangered species, such as river dolphin and river otter. Collaboration with fishers through LEK studies can be a viable approach to produce reliable data on fish trophic ecology to improve fisheries management and species conservation in tropical freshwater environments and other regions with data limitations.

scholarly journals Flow intermittency influences the trophic base, but not the overall diversity of alpine stream food webs

Ecography ◽  
2019 ◽  
Vol 42 (9) ◽  
pp. 1523-1535 ◽  
Author(s):  
Andre R. Siebers ◽  
Amael Paillex ◽  
Christopher T. Robinson
Keyword(s):  
Food Webs ◽  
Alpine Stream ◽  
Flow Intermittency ◽  
Stream Food Webs

scholarly journals Pulse of dissolved organic matter alters reciprocal carbon subsidies between autotrophs and bacteria in stream food webs

2020 ◽  
Vol 90 (1) ◽  
Author(s):  
Benoît O. L. Demars ◽  
Nikolai Friberg ◽  
Barry Thornton
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Food Webs ◽  
Stream Food Webs

Use of Stable Isotopes to Trace Municipal Wastewater Effluents into Food Webs within a Highly Developed River System

2014 ◽  
Vol 31 (9) ◽  
pp. 1093-1100 ◽  
Author(s):  
H. A. Loomer ◽  
K. D. Oakes ◽  
S. L. Schiff ◽  
W. D. Taylor ◽  
M. R. Servos
Keyword(s):  
Stable Isotopes ◽  
Food Webs ◽  
Municipal Wastewater ◽  
River System ◽  
Wastewater Effluents

Impacts of aquatic invasive species and land use on stream food webs in Kaua’i, Hawai’i.

2014 ◽  
Vol 20 (3) ◽  
pp. 252 ◽  
Author(s):  
Megan Layhee ◽  
Michael P. Marchetti ◽  
Sudeep Chandra ◽  
Tag Engstrom ◽  
Daniel Pickard
Keyword(s):  
Invasive Species ◽  
Food Webs ◽  
Introduced Species ◽  
Human Disturbance ◽  
Habitat Degradation ◽  
Community Change ◽  
Ecological Communities ◽  
Native Populations ◽  
Niche Area ◽  
Stream Food Webs

Anthropogenic disturbance is restructuring ecosystems and changing interactions within ecological communities. On the Hawaiʼian Islands, habitat degradation is linked to the establishment of invasive species; and together these stressors may lead to declining native populations and changes in food webs. In this study we employed stable isotopes to examine the structure of multiple Hawaiʼian stream food webs with varying levels of these stressors to illustrate interactions between native and non-native organisms that may represent drivers of community change. Limahuli stream contains all five species of native Hawaiʼian gobies, has a small number of introduced species, and minimal human disturbance. ʻOpaekaʼa, Hul¯eʼia and Kapaʼa streams are more heavily invaded than Limahuli and have greater human influence. We found increased species richness, increased trophic diversity, and increased total niche area in the more heavily invaded stream food webs relative to Limahuli. We also found non-native predatory species inhabiting top trophic positions in the three more heavily invaded streams and isotope mixing model estimates suggest that several species of non-natives have overlapping prey sources with native gobies in these sites. Lastly, we found that native stream organisms were nearly absent in ʻOpaekaʼa stream which also had the highest percent urban development of the streams sampled. Our results suggest significant trophic changes have occurred as the result of introduced species and possibly related to increased human disturbance.

scholarly journals Anthropogenic land-use signals propagate through stream food webs in a California, USA, watershed

Limnologica ◽  
2014 ◽  
Vol 46 ◽  
pp. 124-130 ◽  
Author(s):  
Jonathan W. Moore ◽  
Timothy D. Lambert ◽  
Walter N. Heady ◽  
Susanna E. Honig ◽  
Ann-Marie K. Osterback ◽  
...  
Keyword(s):  
Land Use ◽  
Food Webs ◽  
Anthropogenic Land Use ◽  
Stream Food Webs
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