scholarly journals Mismatched diets: defining the nutritional landscape of grasshopper communities in a variable environment

Ecosphere ◽  
2021 ◽  
Vol 12 (3) ◽  
Author(s):  
Douglas Lawton ◽  
Marion Le Gall ◽  
Cathy Waters ◽  
Arianne J. Cease
Keyword(s):  
Variable Environment

Age, timing, and a variable environment affect double brooding of a long-lived seabird

2017 ◽  
Vol 564 ◽  
pp. 187-197 ◽  
Author(s):  
ME Johns ◽  
P Warzybok ◽  
RW Bradley ◽  
J Jahncke ◽  
M Lindberg ◽  
...  
Keyword(s):  
Variable Environment ◽  
Double Brooding

The Limitations of Wintering Away From Customary Pastures in Relation to Dzud in Mongolia's Gobi Region

2020 ◽  
Vol 24 (1) ◽  
pp. 86-110
Author(s):  
Annika Ericksen
Keyword(s):  
Expert Knowledge ◽  
Ethnographic Research ◽  
Heavy Snowfall ◽  
Variable Environment ◽  
Migration Decisions ◽  
Complicating Factors ◽  
High Uncertainty

This article, based on ethnographic research in a Gobi district in Mongolia, focuses on herders 'wintering away' from customary winter campsites to access better pasture elsewhere. Because of the drawbacks associated with wintering at non-customary as opposed to 'home' pastures, many herders consider 'wintering away' to be a last resort. In the 2009–10 dzud (winter disaster), in Bayanlig soum, most households that wintered away were hit by unusually heavy snowfall and suffered higher livestock losses than those households that stayed at their customary campsites. While herders' migration decisions are guided by expert knowledge of the environment, complicating factors and high uncertainty can contribute to livestock losses despite their best efforts. Mobility is essential to herders' success in a variable environment, but not all forms and instances of migration are equally beneficial. This article draws on herders' accounts to explore a migration dilemma in the Gobi that may become more common.

scholarly journals Within- and among-population variation in vital rates and population dynamics in a variable environment

2016 ◽  
Vol 26 (7) ◽  
pp. 2086-2102 ◽  
Author(s):  
Simone Vincenzi ◽  
Marc Mangel ◽  
Dusˇan Jesensˇek ◽  
John C. Garza ◽  
Alain J. Crivelli
Keyword(s):  
Population Dynamics ◽  
Population Variation ◽  
Vital Rates ◽  
Variable Environment

scholarly journals Effects of temperature on the behaviour and metabolism of an intertidal foraminifera and consequences for benthic ecosystem functioning

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Noémie Deldicq ◽  
Dewi Langlet ◽  
Camille Delaeter ◽  
Grégory Beaugrand ◽  
Laurent Seuront ◽  
...  
Keyword(s):  
High Temperature ◽  
Ecosystem Functioning ◽  
Photosynthetic Activity ◽  
Species Traits ◽  
Biogeochemical Cycles ◽  
Variable Environment ◽  
Sediment Reworking ◽  
Temperature Regimes ◽  
Slow Moving ◽  
Effects Of Temperature

AbstractHeatwaves have increased in intensity, duration and frequency over the last decades due to climate change. Intertidal species, living in a highly variable environment, are likely to be exposed to such heatwaves since they can be emerged for more than 6 h during a tidal cycle. Little is known, however, on how temperature affects species traits (e.g. locomotion and behaviour) of slow-moving organisms such as benthic foraminifera (single-celled protists), which abound in marine sediments. Here, we examine how temperature influences motion-behaviour and metabolic traits of the dominant temperate foraminifera Haynesina germanica by exposing individuals to usual (6, 12, 18, 24, 30 °C) and extreme (high; i.e. 32, 34, 36 °C) temperature regimes. Our results show that individuals reduced their activity by up to 80% under high temperature regimes whereas they remained active under the temperatures they usually experience in the field. When exposed to a hyper-thermic stress (i.e. 36 °C), all individuals remained burrowed and the photosynthetic activity of their sequestered chloroplasts significantly decreased. Recovery experiments subsequently revealed that individuals initially exposed to a high thermal regime partially recovered when the hyper-thermic stress ceased. H. germanica contribution to surface sediment reworking substantially diminished from 10 mm3 indiv−1 day−1 (usual temperature) to 0 mm3 indiv−1 day−1 when individuals were exposed to high temperature regimes (i.e. above 32 °C). Given their role in sediment reworking and organic matter remineralisation, our results suggest that heatwaves may have profound long-lasting effects on the functioning of intertidal muddy ecosystems and some key biogeochemical cycles.

scholarly journals A system for the determination of surface water pCO2 in a highly variable environment, exemplified in the southern Baltic Sea

Oceanologia ◽  
2021 ◽  
Vol 63 (2) ◽  
pp. 276-282
Author(s):  
Marcin Stokowski ◽  
Przemysław Makuch ◽  
Krzysztof Rutkowski ◽  
Marcin Wichorowski ◽  
Karol Kuliński
Keyword(s):  
Surface Water ◽  
Baltic Sea ◽  
Variable Environment ◽  
Southern Baltic Sea ◽  
Southern Baltic

Long-term demography of the Northern Goshawk in a variable environment

2017 ◽  
Vol 197 (1) ◽  
pp. 1-40 ◽  
Author(s):  
Richard T. Reynolds ◽  
Jeffrey S. Lambert ◽  
Curtis H. Flather ◽  
Gary C. White ◽  
Benjamin J. Bird ◽  
...  
Keyword(s):  
Variable Environment ◽  
Northern Goshawk
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