scholarly journals Foraging niche shift maintains breeding parameters of a colonial waterbird during range expansion

2020 ◽  
Vol 10 (4) ◽  
pp. 1988-1997
Author(s):  
Charlotte Francesiaz ◽  
Elizabeth Yohannes ◽  
Aurélien Besnard ◽  
Nicolas Sadoul ◽  
Thomas Blanchon ◽  
...  
Keyword(s):  
Range Expansion ◽  
Niche Shift ◽  
Breeding Parameters ◽  
Foraging Niche

scholarly journals Repeated range expansion and niche shift in a volcanic hotspot archipelago: radiation of Hawaiian Euphorbia (Euphorbiaceae)

2016 ◽  
Author(s):  
Ya Yang ◽  
Clifford W. Morden ◽  
Margaret J. Sporck-Koehler ◽  
Lawren Sack ◽  
Paul E. Berry
Keyword(s):  
Range Expansion ◽  
Native Species ◽  
Hawaiian Islands ◽  
Hawaiian Island ◽  
Coastal Vegetation ◽  
Niche Shift ◽  
Data Set ◽  
Widespread Species ◽  
Island Endemic ◽  
Ideal System

AbstractAim The taxon cycle hypothesis describes the cyclic movement of taxa during range expansion and contraction, accompanied by an evolutionary shift from open and often coastal vegetation to closed, and often inland forest vegetation in island systems. The Hawaiian Archipelago is an ideal system to test this hypothesis given the linear fashion of island formation and a relatively well-understood geological history.Location Hawaiian Islands.Methods We sampled 153 individuals in 15 of the 16 native species of Hawaiian Euphorbia section Anisophyllum on six major Hawaiian Islands, plus 11 New World close relatives, to elucidate the biogeographic movement of this lineage along the Hawaiian island chain. We used a concatenated chloroplast DNA data set of more than eight kilobases in aligned length and applied maximum likelihood and Bayesian inference for phylogenetic reconstruction. Connectivity among islands and habitat types was estimated using BayesTraits. Age and phylogeographic patterns were co-estimated using BEAST. In addition, we used nuclear ribosomal ITS and the low-copy genes LEAFY and G3pdhC to investigate the reticulate relationships within this radiation.Results We estimate that Hawaiian Euphorbia first arrived on Kauai or Niihau ca. 5 million years ago and subsequently diverged into 16 species on all major Hawaiian Islands. During this process Euphorbia dispersed from older to younger islands in a stepping-stone fashion through open, dispersal-prone habitats. Taxa that occupy closed vegetation on Kauai and Oahu evolved in situ from open vegetation taxa of the same island. Consequently, widespread species tend to occupy habitats with open vegetation, whereas single island endemic species predominantly occur in habitats with closed canopy and are only found on the two oldest islands of Kauai and Oahu.Main conclusions The spatial and temporal patterns of dispersal and range shifts in Hawaiian Euphorbia support an intra-volcanic-archipelago version of the taxon cycle hypothesis.

scholarly journals Seasonal shift in the foraging niche of a tropical avian resident: resource competition at work?

2006 ◽  
Vol 22 (4) ◽  
pp. 385-395 ◽  
Author(s):  
Julie A. Jedlicka ◽  
Russell Greenberg ◽  
Ivette Perfecto ◽  
Stacy M. Philpott ◽  
Thomas V. Dietsch
Keyword(s):  
Resource Competition ◽  
Bird Species ◽  
Dry Season ◽  
Niche Shift ◽  
Resident Species ◽  
Wet Season ◽  
Foraging Niche ◽  
Coffee Farm ◽  
Migrant Birds ◽  
Resident Bird

This study examined the foraging behaviour of a resident bird species, the rufous-capped warbler (RCWA, Basileuterus rufifrons), in a shaded-coffee farm in Chiapas, Mexico. Unlike many resident species that use shaded-coffee agroecosystems seasonally, RCWAs do not move to other habitats when migrants are present. RCWA foraging was compared when migrant birds were present (dry season) and absent (wet season). It was hypothesized that RCWAs would exhibit a seasonal foraging niche shift because of resource competition with migrants. Observations from both the canopy and coffee understorey show that RCWAs foraged almost equally in both vegetative layers during the wet season although they were more successful foraging in the canopy. In the dry season, migrants foraged primarily in the canopy and RCWAs shifted so that 80% of RCWA foraging manoeuvres were in the understorey. At that time RCWAs foraged less successfully in both vegetative layers. Avian predation in the dry season was found to reduce densities of arthropods by 47–79% in the canopy, as opposed to 4–5% in the understorey. In the canopy, availability of large (>5 mm in length) arthropods decreased by 58% from the wet to dry season. Such resource reductions could have caused the RCWA foraging niche shift yet other alternative or additional hypotheses are discussed. Shifts in foraging niche may be a widespread mechanism for some small insectivorous residents to avoid seasonal competition with abundant migrant species.

scholarly journals Niche shift and resource supplementation facilitate an amphibian range expansion

2018 ◽  
Vol 25 (1) ◽  
pp. 154-165 ◽  
Author(s):  
Sarah J. Davies ◽  
Matthew P. Hill ◽  
Melodie A. McGeoch ◽  
Susana Clusella-Trullas
Keyword(s):  
Range Expansion ◽  
Niche Shift

scholarly journals Repeated range expansion and niche shift in a volcanic hotspot archipelago: Radiation of C4HawaiianEuphorbiasubgenusChamaesyce(Euphorbiaceae)

2018 ◽  
Vol 8 (16) ◽  
pp. 8523-8536 ◽  
Author(s):  
Ya Yang ◽  
Clifford W. Morden ◽  
Margaret J. Sporck‐Koehler ◽  
Lawren Sack ◽  
Warren L. Wagner ◽  
...  
Keyword(s):  
Range Expansion ◽  
Niche Shift

Potential range expansion and niche shift of the invasive Hyphantria cunea between native and invasive countries

2021 ◽  
Author(s):  
Xinggang Tang ◽  
Yingdan Yuan ◽  
Xiaofei Liu ◽  
Jinchi Zhang
Keyword(s):  
Range Expansion ◽  
Niche Shift ◽  
Potential Range ◽  
Hyphantria Cunea

Investigation on Transmission Power Control Suitable for Heterogeneous Network Employing Cell Range Expansion in LTE-Advanced Uplink

2013 ◽  
Vol E96.B (4) ◽  
pp. 1051-1060 ◽  
Author(s):  
Akihito MORIMOTO ◽  
Nobuhiko MIKI ◽  
Hiroyuki ISHII ◽  
Daisuke NISHIKAWA ◽  
Yukihiko OKUMURA
Keyword(s):  
Power Control ◽  
Range Expansion ◽  
Heterogeneous Network ◽  
Transmission Power ◽  
Transmission Power Control ◽  
Cell Range Expansion ◽  
Lte Advanced ◽  
Cell Range

Host range expansion and the insect immune response

2016 ◽  
Author(s):  
Angela Smilanich
Keyword(s):  
Immune Response ◽  
Host Range ◽  
Range Expansion ◽  
Host Range Expansion ◽  
Insect Immune Response
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