stream food webs
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2021 ◽  
Author(s):  
Caryn C. Vaughn ◽  
Thomas B. Parr ◽  
Traci P. DuBose ◽  
Kiza K. Gates ◽  
Garrett W. Hopper ◽  
...  

Ecology ◽  
2021 ◽  
Author(s):  
Jordi‐René Mor ◽  
Isabel Muñoz ◽  
Sergi Sabater ◽  
Lluís Zamora ◽  
Albert Ruhi

Ecosphere ◽  
2021 ◽  
Vol 12 (3) ◽  
Author(s):  
Lauren Zatkos ◽  
Ivan Arismendi ◽  
Sherri L. Johnson ◽  
Brooke E. Penaluna
Keyword(s):  

2021 ◽  
Vol 78 (2) ◽  
pp. 154-164
Author(s):  
Niall G. Clancy ◽  
Janice Brahney ◽  
James Dunnigan ◽  
Phaedra Budy

Stream habitat changes affecting primary consumers often indirectly impact secondary consumers such as fishes. Blooms of the benthic algae Didymosphenia geminata (Didymo) are known to affect stream macroinvertebrates, but the potential indirect trophic impacts on fish consumers are poorly understood. In streams of the Kootenai River basin, we quantified the diet, condition, and growth rate of species of trout, char, and sculpin. In 2018, macroinvertebrate taxa composition was different between a stream with Didymo and a stream without, but trout diets, energy demand, and growth rates were similar. Trout abundance was higher in the stream with Didymo, but the amount of drifting invertebrates was higher in the stream without. In 2019, we surveyed 28 streams with a gradient of coverage. Didymo abundance was correlated only with the percentage of aquatic invertebrates in trout diets and was not related to diets of char or sculpin or condition of any species. Thus, we found no evidence for a trophic link between Didymo blooms and the condition or growth of trout, char, or sculpin in mountainous headwater streams.


Author(s):  
Daniel L. Preston ◽  
Tamara J. Layden ◽  
Leah M. Segui ◽  
Landon P. Falke ◽  
Sara V. Brant ◽  
...  

Author(s):  
Sophie N. Cormier ◽  
Jordan L. Musetta-Lambert ◽  
Kristin J. Painter ◽  
Adam G. Yates ◽  
Robert B. Brua ◽  
...  

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

Author(s):  
Jennifer L. Anderson ◽  
Ludmila Marvanová

ABSTRACTThe ascomycete genus Tetracladium is best known for containing aquatic hyphomycetes, which are important decomposers in stream food webs. However, some species of Tetracladium are thought to be multifunctional and are also endobionts in plants. Suprisingly, Tetracladium sequences are increasingly being reported from metagenomics and metabarcoding studies of both plants and soils world-wide. It is not clear how these sequences are related to the described species and little is known about the non-aquatic biology of these fungi. Here, the genomes of 24 Tetracladium strains, including all described species, were sequenced and used to resolve relationships among taxa and to improve our understanding of ecological and genomic diversity in this group. All genome-sequenced Tetracladium fungi form a monophyletic group. Conspecific strains of T. furcatum from both aquatic saprotrophic and endobiont lifestyles and a putative cold-adapted clade are identified. Analysis of ITS sequences from water, soil, and plants from around the world reveals that multifunctionality may be widespread through the genus. Further, frequent reports of these fungi from extreme environments suggest they may have important but unknown roles in those ecosystems. Patterns of predicted carbohydrate active enzymes (CAZyme) and secondary metabolites in the Tetracladium genomes are more similar to each other than to other ascomycetes, regardless of ecology, suggesting a strong role for phylogeny shaping genome content in the genus. Tetracladium genomes are enriched for pectate lyase domains (including PL3-2), GH71 α-1,3-glucanase domains and CBM24 α-1,3-glucan/mutan binding modules, and both GH32 and CBM38, inulinase and inulin binding modules. These results indicate that these fungi are well-suited to digesting pectate and pectin in leaves when living as aquatic hyphomycetes, and inulin when living as root endobionts. Enrichment for α-1,3-glucanase domains may be associated with interactions with biofilm forming microorganisms in root and submerged leaf environments.


2020 ◽  
Vol 89 (6) ◽  
pp. 1468-1481
Author(s):  
Lee M. Demi ◽  
Jonathan P. Benstead ◽  
Amy D. Rosemond ◽  
John C. Maerz

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