3/11/2023 0 Comments Alisa bragina 2013Sundaresan, Dorj Usukhjargal, Ganbold Uuganbayar, John M. Stabach, Seth Stapleton, Olav Strand, Siva R. Scasta, Johannes Signer, Melissa Songer, Jared A. Merkle, Thomas Mueller, Jeff Muntifering, Atle Mysterud, Kirk A. Ford, Kate Jenks, Mahmoud‐Reza Hemami, Jacob D. Cross, Nandintsetseg Dejid, Jagdag Enkhbyar, Ilya R. Boone, Francesca Cagnacci, Simon Chamaillé‐Jammes, Buyanaa Chimeddorj, Paul C. King, Briana Abrahms, Bayarbaatar Buuveibaatar, Jeffrey L. In the light of ubiquitous anthropogenic environmental change, understanding the relationship between the green wave and ungulate space use has important consequences for the management and conservation of migratory ungulates and the phenomenon of migration itself. We conclude that whereas in some systems migration itself is a way to surf the green wave, in others it may simply be a means to reconnect with phenological spring at the summer range. Those differences that we did detect pointed toward additional constraints on female space-use tactics, such as those posed by calving and caring for dependent offspring. Despite pronounced differences in their life histories, we found only marginal differences between male and female red deer in this study. Rather than “surfing the green wave” during migration, migratory red deer moved rapidly from the winter to the summer range, thereby “jumping the green wave.” However, migrants and, to a lesser degree, residents did track phenological green-up through parts of the growing season by making smaller-scale adjustments in habitat use. Deer were also more likely to migrate in areas where migration led to greater gains in springness. Consistent with the FMH, migrants experienced substantially greater access to early plant phenology than did residents. We linked plant phenology (MODIS–normalized difference vegetation index data) and space use of 167 migratory and 78 resident red deer ( Cervus elaphus), using a space-time-time matrix of “springness,” defined as the instantaneous rate of green-up. Despite strong support for the FMH, the actual relationship between plant phenology and ungulate movement has remained enigmatic. The forage-maturation hypothesis (FMH) states that herbivores migrate along a phenological gradient of plant development in order to maximize energy intake.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |