scholarly journals Salmonid thermal habitat contraction in a hydrogeologically complex setting

Ecosphere ◽  
2021 ◽  
Vol 12 (10) ◽  
Author(s):  
Antóin M. O'Sullivan ◽  
Emily Corey ◽  
Richard A. Cunjak ◽  
Tommi Linnansaari ◽  
R. Allen Curry
Keyword(s):  
Thermal Habitat

Modelling fish physico-thermal habitat selection using functional regression

2021 ◽  
pp. 1-16
Author(s):  
Jérémie Boudreault ◽  
André St-Hilaire ◽  
Fateh Chebana ◽  
Normand E. Bergeron
Keyword(s):  
Habitat Selection ◽  
Functional Regression ◽  
Thermal Habitat

scholarly journals Disentangling controls on animal abundance: Prey availability, thermal habitat, and microhabitat structure

2021 ◽  
Author(s):  
Emma A. Higgins ◽  
Doreen S. Boyd ◽  
Tom W. Brown ◽  
Sarah C. Owen ◽  
Adam C. Algar
Keyword(s):  
Prey Availability ◽  
Thermal Habitat ◽  
Animal Abundance ◽  
Microhabitat Structure

Overwinter thermal habitat use in lakes by anadromous Arctic char

2018 ◽  
Vol 75 (12) ◽  
pp. 2343-2353 ◽  
Author(s):  
Ingeborg M. Mulder ◽  
Corey J. Morris ◽  
J. Brian Dempson ◽  
Ian A. Fleming ◽  
Michael Power
Keyword(s):  
Habitat Use ◽  
Water Column ◽  
Prey Capture ◽  
Salvelinus Alpinus ◽  
Late Summer ◽  
Arctic Char ◽  
Foraging Efficiency ◽  
Thermal Habitat ◽  
Metabolic Costs ◽  
Seaward Migration

Anadromous Arctic char (Salvelinus alpinus) migrate back to fresh water in late summer to spawn and (or) overwinter. Upon freshwater entry, feeding is reduced or absent, and movement activity is restricted. While the physiological responses to low temperatures (e.g., growth, metabolism) are understood, specifics of the use of thermal habitat for overwintering remains poorly characterized. This study used acoustic and archival telemetry data from two lakes in southern Labrador, Canada, to study thermal habitat use during the ice-covered period. Results showed that lake-dwelling anadromous Arctic char predominantly occupied a narrow range of temperatures (0.5–2 °C) and used cooler temperatures available within the middle and upper water column. Use of the selected temperatures is likely a strategy that lowers metabolic costs and minimizes energy expenditure, preserving stored lipids for overwinter survival and the energetic costs of preparation for seaward migration. As Arctic char are visual feeders, use of the upper water column is also thought to aid foraging efficiency by increasing the likelihood of prey capture.

PREDICTING INFLUENCES OF URBAN DEVELOPMENT ON THERMAL HABITAT IN A WARM WATER STREAM

2004 ◽  
Vol 40 (6) ◽  
pp. 1645-1658 ◽  
Author(s):  
Colin W. Krause ◽  
Brendan Lockard ◽  
Tammy J. Newcomb ◽  
David Kibler ◽  
Vinod Lohani ◽  
...  
Keyword(s):  
Urban Development ◽  
Warm Water ◽  
Water Stream ◽  
Thermal Habitat

The frictional, hydrologic, metamorphic and thermal habitat of shallow slow earthquakes

2015 ◽  
Vol 8 (8) ◽  
pp. 594-600 ◽  
Author(s):  
Demian M. Saffer ◽  
Laura M. Wallace
Keyword(s):  
Thermal Habitat ◽  
Slow Earthquakes

scholarly journals Fragmentation mediates thermal habitat choice in ciliate microcosms

2020 ◽  
Vol 287 (1919) ◽  
pp. 20192818
Author(s):  
Estelle Laurent ◽  
Nicolas Schtickzelle ◽  
Staffan Jacob
Keyword(s):  
Habitat Fragmentation ◽  
Evolutionary Dynamics ◽  
Environmental Changes ◽  
Tetrahymena Thermophila ◽  
Habitat Choice ◽  
Emigration And Immigration ◽  
Dispersal Rate ◽  
Thermal Habitat ◽  
Twofold Increase ◽  
Dynamics Of Populations

Habitat fragmentation is expected to reduce dispersal movements among patches as a result of increased inter-patch distances. Furthermore, since habitat fragmentation is expected to raise the costs of moving among patches in the landscape, it should hamper the ability or tendency of organisms to perform informed dispersal decisions. Here, we used microcosms of the ciliate Tetrahymena thermophila to test experimentally whether habitat fragmentation, manipulated through the length of corridors connecting patches differing in temperature, affects habitat choice. We showed that a twofold increase of inter-patch distance can as expected hamper the ability of organisms to choose their habitat at immigration. Interestingly, it also increased their habitat choice at emigration, suggesting that organisms become choosier in their decision to either stay or leave their patch when obtaining information about neighbouring patches gets harder. This study points out that habitat fragmentation might affect not only dispersal rate but also the level of non-randomness of dispersal, with emigration and immigration decisions differently affected. These consequences of fragmentation might considerably modify ecological and evolutionary dynamics of populations facing environmental changes.

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