A MAMMALIAN PREDATOR-PREY IMBALANCE: GRIZZLY BEAR AND WOLF EXTINCTION AFFECT AVIAN NEOTROPICAL MIGRANTS

By J. Berger, P. Stacey, L. Bellis, Matthew Johnson. 2001

354 citations recorded by the source corpus.

Subfields: Ecology

View Paper: https://www.semanticscholar.org/paper/80b261ce5f62a7c7437072159393c377987d6289

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In Ecology

Citations in the corpus

Large predators and trophic cascades in terrestrial ecosystems of the western United States (2009, background): “For example, Berger et al. (2001) observed that the consequence of grizzly bear and wolf extirpation in Grand Teton NP was reduced species richness and nesting density of neotropical migrants.”
Predator interactions, mesopredator release and biodiversity conservation. (2009, background): “There is potential for the restoration of apex predators to have benefits for biodiversity conservation through moderation of the impacts of mesopredators on their prey, but this requires a whole-ecosystem view to avoid unforeseen negative effects.”
Ecologically justified charisma: preservation of top predators delivers biodiversity conservation (2006, background): “…are often keystone species, their impact on other biota cascading down through the ecosystem and ultimately affecting community structure and biodiversity levels, with positive effects on species numbers (Terborgh et al. 1999; Schmitz, Hambäck & Beckerman 2000; Berger et al. 2001; Duffy 2002).”
A natural experiment on the impact of overabundant deer on songbird populations (2005, neutral): “Berger et al. (2001) also did suggest a connection between declines in neotropical migrants and high herbivore densities.”
Top Predators as Conservation Tools: Ecological Rationale, Assumptions, and Efficacy (2008, methodology): “i Based on three 100-m transects spaced ≥200 m apart (Berger et al. 2001).”
The Importance of Large Carnivores to Healthy Ecosystems (2001, background): “Similarly, hyperabundance of moose in areas of he Greater Yellowstone Ecosystem without wolves and grizzly bears (Ursus arctos) has reduced neotropical migrant bird populations (Berger et al. 2001).”
Ecosystem and competition impacts of introduced deer (2008, neutral): “In turn, this can have cascade effects on biodiversity, including songbird abundance and species composition (McShea and Rappole 2000; Berger et al. 2001; Fuller 2001; Allombert et al. 2005 a ; Gill and Fuller 2007), nest predation rates (Martin and Joron 2003), the abundance and density of…”
Strongly Interacting Species: Conservation Policy, Management, and Ethics (2005, result): “A similar trend has been observed in Grand Teton National Park, where a decrease in Neotropical migrant bird diversity has been attributed to overbrowsing by moose in riparian willow communities in the absence of wolf predation or sport hunting of moose ( Berger et al. 2001 ).”
The role of biotic interactions in shaping distributions and realised assemblages of species: implications for species distribution modelling (2012, background): “Similarly, the eradication of wolves and grizzly bears (Ursus arctos) in the Grand Teton National Park resulted in a strong increase in moose density, with consequent overbrowsing of riparian vegetation and the disappearance of migratory birds in the impacted willow communities (Berger et al., 2001)”
Widespread mesopredator effects after wolf extirpation (2013, background): “These cervid irruptions have been documented to have cascading impacts on plant biomass, vertebrate and invertebrate species abundance, and stream hydromorphology (Berger et al., 2001; Hebblewhite et al., 2005; Ripple and Beschta, 2006; but see Mech, 2012).”
HUMAN ACTIVITY MEDIATES A TROPHIC CASCADE CAUSED BY WOLVES (2005, background): “Finally, wolf exclusion indirectly reduced songbird diversity and abundance but not evenness, suggesting the mechanism influencing bird diversity was not through species dominance, but changes in species composition (Berger et al. 2001).”
A cross-ecosystem comparison of the strength of trophic cascades (2002, background): “…plant growth, leaf damage, or species composition, McClaren & Peterson 1994; Krebs et al. 1995; Dyer & Letourneau 1999; Schoener & Spiller 1999; Berger et al. 2001; Terborgh et al. 2001), effects on plant community biomass have been shown much less often, and are generally weaker when they…”
Large Bird Declines with Increasing Human Pressure in Savanna Woodlands (Burkina Faso) (2006, background): “The indirect effect of the extinction of large predators, through the subsequent increase of smaller predators, is a well known threat to bird communities (Berger et al. 2001) but there is still no evidence of such a phenomenon in West Africa.”
Linking wolves to willows via risk-sensitive foraging by ungulates in the northern Yellowstone ecosystem (2006, background): “Wolves can clearly influence the size of ungulate populations through direct mortality (lethal effects), which, in turn, can affect herbivory pressure on plants (McLaren and Peterson, 1994; Messier, 1994; Berger et al., 2001a; Ripple and Beschta, 2005b).”