Search Results - "Freeman, Benjamin G."

Climate change causes upslope shifts and mountaintop extirpations in a tropical bird community by Freeman, Benjamin G., Scholer, Micah N., Ruiz-Gutierrez, Viviana, Fitzpatrick, John W.

“…Montane species worldwide are shifting upslope in response to recent temperature increases. These upslope shifts are predicted to lead to mountaintop…”
Get full text

Expanding, shifting and shrinking: The impact of global warming on species’ elevational distributions by Freeman, Benjamin G., Lee-Yaw, Julie A., Sunday, Jennifer M., Hargreaves, Anna L.

“…Aim Species are responding to climate warming by shifting their distributions toward historically cooler regions, but the degree to which expansions at cool…”
Get full text

Rapid upslope shifts in New Guinean birds illustrate strong distributional responses of tropical montane species to global warming by Freeman, Benjamin G., Freeman, Alexandra M. Class

“…Temperate-zone species have responded to warming temperatures by shifting their distributions poleward and upslope. Thermal tolerance data suggests that…”
Get full text

Ecological and geographical overlap drive plumage evolution and mimicry in woodpeckers by Miller, Eliot T., Leighton, Gavin M., Freeman, Benjamin G., Lees, Alexander C., Ligon, Russell A.

“…Organismal appearances are shaped by selection from both biotic and abiotic drivers. For example, Gloger’s rule describes the pervasive pattern that more…”
Get full text

Pelagic fish predation is stronger at temperate latitudes than near the equator by Roesti, Marius, Anstett, Daniel N., Freeman, Benjamin G., Lee-Yaw, Julie A., Schluter, Dolph, Chavarie, Louise, Rolland, Jonathan, Holzman, Roi

“…Species interactions are widely thought to be strongest in the tropics, potentially contributing to the greater number of species at lower latitudes. Yet,…”
Get full text

Host phylogeny and elevation predict infection by avian haemosporidians in a diverse New Guinean bird community by Lau, Geoffrey C. F., Class Freeman, Alexandra M., Pulgarín‐R, Paulo, Cadena, Carlos Daniel, Ricklefs, Robert E., Freeman, Benjamin G.

“…Aim The biotic interactions hypothesis predicts that interactions between species are stronger at lower elevations compared to higher elevations. We tested…”
Get full text

The formation of avian montane diversity across barriers and along elevational gradients by Pujolar, José Martín, Blom, Mozes P. K., Reeve, Andrew Hart, Kennedy, Jonathan D., Marki, Petter Zahl, Korneliussen, Thorfinn S., Freeman, Benjamin G., Sam, Katerina, Linck, Ethan, Haryoko, Tri, Iova, Bulisa, Koane, Bonny, Maiah, Gibson, Paul, Luda, Irestedt, Martin, Jønsson, Knud Andreas

“…Tropical mountains harbor exceptional concentrations of Earth’s biodiversity. In topographically complex landscapes, montane species typically inhabit multiple…”
Get full text

The Geographic Distribution of a Tropical Montane Bird Is Limited by a Tree: Acorn Woodpeckers (Melanerpes formicivorus) and Colombian Oaks (Quercus humboldtii) in the Northern Andes by Freeman, Benjamin G, Mason, Nicholas A

“…Species distributions are limited by a complex array of abiotic and biotic factors. In general, abiotic (climatic) factors are thought to explain species'…”
Get full text

Clutch size declines with elevation in tropical birds by Boyce, Andy J, Freeman, Benjamin G, Mitchell, Adam E, Martin, Thomas E

“…Clutch size commonly decreases with increasing elevation among temperate-zone and subtropical songbird species. Tropical songbirds typically lay small…”
Get full text

Reply to “Convergent and divergent selection in sympatry drive plumage evolution in woodpeckers” by Miller, Eliot T., Leighton, Gavin M., Freeman, Benjamin G., Lees, Alexander C., Ligon, Russell A.

Get full text

Competitive Interactions upon Secondary Contact Drive Elevational Divergence in Tropical Birds by Freeman, Benjamin G.

“…Tropical mountains harbor exceptionally high biodiversity, which is in part due to the marked elevational stratification of tropical biotas. However, the…”
Get full text

Interspecific competition limits bird species' ranges in tropical mountains by Freeman, Benjamin G, Strimas-Mackey, Matthew, Miller, Eliot T

“…Species' geographic ranges are limited by climate and species interactions. Climate is the prevailing explanation for why species live only within narrow…”
Get full text

Montane species track rising temperatures better in the tropics than in the temperate zone by Freeman, Benjamin G., Song, Yiluan, Feeley, Kenneth J., Zhu, Kai

“…Many species are responding to global warming by shifting their distributions upslope to higher elevations, but the observed rates of shifts vary considerably…”
Get full text

Little evidence for Bergmann's rule body size clines in passerines along tropical elevational gradients by Freeman, Benjamin G.

“…Aim: To test whether intra-and interspecific patterns in body mass along elevational gradients follow Bergmann's rule for a subset of tropical montane…”
Get full text

Asymmetric Response of Costa Rican White-Breasted Wood-Wrens (Henicorhina leucosticta) to Vocalizations from Allopatric Populations by Pegan, Teresa M, Rumelt, Reid B, Dzielski, Sarah A, Ferraro, Mary Margaret, Flesher, Lauren E, Young, Nathaniel, Class Freeman, Alexandra, Freeman, Benjamin G

“…Divergence in song between allopatric populations can contribute to premating reproductive isolation in territorial birds. Song divergence is typically…”
Get full text

The latitudinal taxonomy gradient by Freeman, Benjamin G., Pennell, Matthew W.

“…Emerging large-scale datasets coupled with statistical advances have provided new insights into the processes that generate the latitudinal diversity gradient…”
Get full text

Reply to Rehm: Why rates of upslope shifts in tropical species vary is an open question by Freeman, Benjamin G, Freeman, Alexandra M Class

Get full text

Lower elevation animal species do not tend to be better competitors than their higher elevation relatives by Freeman, Benjamin G., Hurlbert, Allen H.

“…Aim What factors set species' range edges? One general hypothesis, often attributed to Darwin and MacArthur, is that interspecific competition prevents species…”
Get full text

Speciation and gene flow across an elevational gradient in New Guinea kingfishers by Linck, Ethan, Freeman, Benjamin G., Dumbacher, John P.

“…Closely related species with parapatric elevational ranges are ubiquitous in tropical mountains worldwide. The gradient speciation hypothesis proposes that…”
Get full text

Using song playback experiments to measure species recognition between geographically isolated populations: A comparison with acoustic trait analyses by Freeman, Benjamin G, Montgomery, Graham A

“…Geographically isolated populations of birds often differ in song. Because birds often choose mates on the basis of their song, song differentiation between…”
Get full text