Effects of rooting by feral hogsSus scrofa L. on the structure of a floodplain vegetation assemblage

Arrington, D. Albrey; Toth, Louis A.; Koebel, Joseph W.

doi:10.1007/bf03161691

Cited by 60 publications

(38 citation statements)

References 23 publications

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“…Although to date analogous experiments have not been performed on non-woody plant species (Schupp et al 1989), existing data confirms that mammalian diets include herbs (Terwilliger 1978;Robinson and Redford 1986;Brooks et al 1997;Tobler 2002). Additionally, nontrophic interactions, including uprooting and trampling, cause considerable damage to understory vegetation and potentially alter species composition (Clark and Clark 1989;Arrington et al 1999;Ickes et al 2001;Gillman and Ogden 2003). Thus, either through direct consumption or nontrophic interactions, mammals could potentially limit the abundance of herbaceous species.…”

Section: Mammalian Effects On Herbaceous Communitymentioning

confidence: 86%

“…On the one hand, mammals may promote plant species diversity by preventing competitive exclusion through selective foraging on seed and seedlings of dominant species, increasing resource heterogeneity via physical disturbance, and enhancing dispersal (Inouye et al 1987;Huntly 1991;Kotanen 1995;Hulme 1996;Welander 2000;Willson and Traveset 2000). Alternatively, mammals may depress plant diversity via indiscriminate herbivory, selective browsing of rare, palatable, or uncompetitive species, and trampling and uprooting during foraging activities (Milton 1940;Pacala and Crawley 1992;Arrington et al 1999;Ickes et al 2001;Russell et al 2001). These two views differ critically in the assumption of how competitively subordinate and/or rare plant species are affected by mammalian activity and ultimately, how this effect will influence overall plant community diversity.…”

Section: Introductionmentioning

confidence: 97%

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The herb community of a tropical forest in central Panamá: dynamics and impact of mammalian herbivores

Royo

Carson

2005

Oecologia

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Mammals are hypothesized to either promote plant diversity by preventing competitive exclusion or limit diversity by reducing the abundance of sensitive plant species through their activities as browsers or disturbance agents. Previous studies of herbivore impacts in plant communities have focused on tree species and ignored the herbaceous community. In an experiment in mature-phase, tropical moist forest sites in central Panamá, we studied the impact of excluding ground-dwelling mammals on the richness and abundance of herbs in 16, 30x45-m plots. Within each plot, we censused the herbaceous community in 28, 2x2-m subplots (1,792 m2 total area sampled). We identified over 54 species of herbs averaging 1.21 ramets m-2 and covering approximately 4.25% of the forest floor. Excluding mammals for 5 years had no impact on overall species richness. Within exclosures, however, there was a significant two-fold increase in the density of rare species. Overall herbaceous density and percent cover did not differ between exclosures and adjacent control plots, although cover did increase over time. Mammalian exclusion significantly increased the total cover of three-dominant herb species, Pharus latifolius, Calathea inocephala, and Adiantum lucidum, but did not affect their density. This study represents one of the most extensive herbaceous community censuses conducted in tropical forests and is among a few that quantify herbaceous distribution and abundance in terms of both density and cover. Additionally, this work represents the first community level test of mammalian impacts on the herbaceous community in a tropical forest to date. Our results suggest that ground dwelling mammals do not play a key role in altering the relative abundance patterns of tropical herbs in the short term. Furthermore, our results contrast sharply with prior studies on similar temporal and spatial scales that demonstrate mammals strongly alter tree seedling composition and reduce seedling density. Thus, we question the pervasiveness of top-down control on tropical plant communities and the paradigm that defaunation will inexorably lead to widespread, catastrophic shifts in plant communities.

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Section: Mammalian Effects On Herbaceous Communitymentioning

confidence: 86%

Section: Introductionmentioning

confidence: 97%

The herb community of a tropical forest in central Panamá: dynamics and impact of mammalian herbivores

Royo

Carson

2005

Oecologia

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“…As with beaver, humans profoundly altered the intensity of this action by these other large mammals at large spatial scales, either by heavily reducing populations of native species or by introducing feral species from other continents (Arrington et al, 1999;Butler, 2006). …”

Section: Beaver and Riparian Vegetationmentioning

confidence: 99%

Geomorphological implications of engineering bed sediments by lotic animals

Statzner

2012

Geomorphology

102

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Section: Discussionmentioning

confidence: 89%

“…In other studies, failure rates for ear-tag transmitters varied from 17% for calves in Idaho, USA (J. Oakleaf, United States Fish and Wildlife Service, personal communication) to as high as 56% for wild boar in central Florida, USA (Arrington et al 1999). Arrington et al (1999) maintained that the high failure rates for ear-tag transmitters in their study occurred because wild boars routinely engaged in rooting behavior that could easily damage transmitters. Because we have no reason to expect that foals treated transmitters more roughly than calves, we suspect that differences in how the 2 transmitter models were manufactured probably accounted for the disparity in integrity loss rate and time to integrity loss between study sites and/or species.…”

Section: Discussionmentioning

confidence: 89%

Integrity and retention of ear‐tag radiotransmitters in domestic cattle and feral horses

Kluever

Lagos

Breck

et al. 2012

Wildlife Society Bulletin

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Radiotelemetry is an important tool for wildlife management and research, but in some cases attachment of neck collars can be problematic. An alternative in large mammals is to attach transmitters to the ear, though little is published about ear-tag radiotransmitter integrity (i.e., how long a transmitter emits a useful signal) and retention (i.e., how long a transmitter remains attached to an animal). Here we report eartag transmitter integrity and retention from 2 studies monitoring free-ranging calves (Bos taurus) in eastern Arizona, USA, and feral horse (Equus ferus) foals in northwestern Spain. Transmitter integrity and retention was lower for transmitters attached to foals then calves. The primary cause for reduced integrity was antennas breaking off, whereas the primary retention problem involved transmitters ripping out of the ear. When data were pooled across study sites, mean integrity and retention loss was 111 days and 180 days, respectively. Transmitters attached to the interior of the outer ears had retention rates >2 times higher than transmitters attached to the exterior of the outer ear (88% vs. 43%). We recommend that researchers intending to utilize ear-tag transmitters for studies on large domestic or wild animals attach transmitters to the interior of the outer ear, reinforce transmitter antennas in order to improve integrity, and report integrity and retention rates. ß 2012 The Wildlife Society.

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Effects of rooting by feral hogsSus scrofa L. on the structure of a floodplain vegetation assemblage

Cited by 60 publications

References 23 publications

The herb community of a tropical forest in central Panamá: dynamics and impact of mammalian herbivores

The herb community of a tropical forest in central Panamá: dynamics and impact of mammalian herbivores

Geomorphological implications of engineering bed sediments by lotic animals

Integrity and retention of ear‐tag radiotransmitters in domestic cattle and feral horses

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