Movement and ranging patterns of a tropical rat (Leopoldamys sabanus) in logged and unlogged rain forests

Tropical forests are experiencing enormous threats from deforestation and habitat degradation. Much knowledge of the impacts of these land-use changes on tropical species comes from studies examining patterns of richness and abundance. Demographic vital rates (survival, reproduction, and movement) can also be affected by land-use change in a way that increases species vulnerability to extirpation, but in many cases these impacts may not be manifested in short-term changes in abundance or species richness. We conducted a literature review to assess current knowledge and research effort concerning how land-use change affects species vital rates in tropical forest vertebrates. We found a general paucity of empirical research on demography across taxa and regions, with some biases toward mammals and birds and land-use transitions, including fragmentation and agriculture. There is also considerable between-species variation in demographic responses to land-use change, which could reflect trait-based differences in species sensitivity, complex context dependencies (e.g., between-region variation), or inconsistency in methods used in studies. Efforts to improve understanding of anthropogenic impacts on species demography are underway, but there is a need for increased research effort to fill knowledge gaps in understudied tropical regions and taxa. The lack of information on demographic impacts of anthropogenic disturbance makes it difficult to draw definite conclusions about the magnitude of threats to tropical ecosystems under anthropogenic pressures. Thus, determining conservation priorities and improving conservation effectiveness remains a challenge.

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“…Alternatively, movement can remain unaffected if logged forests provide habitat or if there is plasticity in species behaviors (Wells et al. ).…”

Section: Impacts Of Anthropogenic Disturbances On Vital Ratesmentioning

confidence: 99%

Impacts of tropical forest disturbance on species vital rates

Cosset

Gilroy

Edwards

2018

Conservation Biology

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“…Indeed, several authors have suggested that the impact of logging depends on the spatial scale of the study [18,69]. The spatial heterogeneity of the study area must therefore be explicitly considered in the sampling design [70][71][72].…”

Section: Choice Of Spatial and Time Scalementioning

confidence: 99%

“…Longitudinal studies can compare the same forest before and after logging harvests and can explicitly control for several environmental gradients within sites [56], which are typically subject to inherent Mongabay.com Open Access Journal -Tropical Conservation Science Vol.6 (1): [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34]2013 Tropical Conservation Science | ISSN 1940-0829 | Tropicalconservationscience.org 25 systematic biases in the choice of logging areas by operators (e.g., logged-over forest tends to be associated with higher pre-logging basal areas). Most studies reviewed here lacked before-and-after data, so researchers should meet the assumption of forest homogeneity in order to compare data within and between studies [69]. Additionally, this presupposes that any structural or compositional differences found in patterns of species abundance and diversity between logged and unlogged forests are induced by logging [17,77], when this is often not the case.…”

Section: Baseline Data and Control Sitesmentioning

confidence: 99%

Assessing Sampling Biases in Logging Impact Studies in Tropical Forests

Laufer

Michalski

Peres

2013

Tropical Conservation Science

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The ecological responses of tropical forest wildlife to selective timber extraction have received considerable attention in the last few decades, yet there is little consensus among the large number of studies about the most appropriate sampling design. Here, we reviewed 26 years of tropical forest logging literature to evaluate the relationship between sampling design and the quality of information reported, which varied greatly among 75 studies. Most studies (88%) failed to include a pre-logging baseline condition in the sampling design, and the temporal scale of post-logging studies was generally inadequate. Studies also usually failed to report key information on study areas; only half of the articles reported some information on the spatial scale of the study, and only one-third presented some quantitative metric to describe forest habitat structure. Additionally, most studies (64%) failed to report the type of forest management and almost half (45%) did not describe the intensity of timber harvest in the logged areas. These sampling and reporting biases in logging studies hugely undermine the comparability among studies. We conclude with some general guidelines to maximize comparability among studies, and to enhance the potential usefulness of future logging studies for wildlife conservation strategies in tropical forest regions.Key words: Selective logging, forest management, sampling design, fauna, wildlife ResumoAs respostas ecológicas da fauna de florestas tropicais para extração seletiva de madeira tem recebido atenção considerável nas últimas décadas, no entanto há pouco consenso entre os estudos quanto ao desenho amostral mais apropriado. Neste estudo, analisamos 26 anos de literatura sobre extração de madeira em florestas tropicais para avaliar a relação entre o desenho amostral e a qualidade das informações fornecidas, o que variou bastante entre os 75 estudos. A maioria dos estudos (88%) não incluiu condições pré-extração, e a escala temporal pós-extração dos estudos foi geralmente inadequada. Os estudos também falharam em relatar as principais informações sobre as áreas de estudo; apenas metade dos artigos relatou algumas informações sobre a escala espacial do estudo, e apenas um terço apresentou alguma métrica quantitativa para descrever a estrutura florestal. Além disso, a maioria dos estudos (64%) não informou o tipo de manejo florestal e quase metade (45%) não descreveu a intensidade de extração de madeira nas áreas exploradas. Esse viés de amostragem e falhas nas informações fornecidas nos estudos reduzem a comparabilidade entre os mesmos. Concluímos com algumas diretrizes gerais para maximizar a comparabilidade entre os estudos, e melhorar a utilidade potencial de futuros estudos de extração de madeira para as estratégias de conservação de fauna em regiões de florestas tropicais. Palavras-chave:Corte seletivo, manejo florestal, desenho amostral, fauna, vida silvestre Mongabay

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“…Aplicando hilos de mayor longitud a los corechis, se puede estudiar el desplazamiento diario completo, las posibles diferencias durante la época reproductiva, si los machos se esfuerzan en la búsqueda de hembras, la dieta -cionar los movimientos con características de microhábitat (estructura y composición de la vegetación). Se pueden realizar también comparaciones en estos aspectos de comportamiento con otras especies simpátricas (Pizzuto et al, 2007;Wells et al, 2008).…”

unclassified

“…La principal alternativa a este método es la radiotelemetría, pero esta metodología permite registrar ubicaciones sin brindar detalles del recorrido (Berry et al, 1987;Anderson et al, 1988;Wells et al, 2008). Al momento de realizar el estudio no había radiotransusarlos en corechis y así obtener mayor detalle de sus recorridos.…”

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Seguimiento del Corechi (Tolypeutes matacus) por Medio de Carreteles de Hilo en el Chaco boliviano

Noss

2013

Edentata

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Resumen El corechi (Tolypeutes matacus) es una presa clave para los cazadores indígenas del Chaco boliviano y está categorizado como "Vulnerable" para el Libro Rojo de Bolivia (2009). Este estudio es parte de un programa más amplio que promueve el uso sostenible de la especie. Con el objetivo de describir el desplazade 33 corechis mediante un carrete con hilo adosado al caparazón de los ejemplares. En 17 animales se utilizó solo un carrete de 350 m porque el mismo se vació antes de que el animal terminara su desplazamiento nocturno, pudiéndose mapear el recorrido, pero no ubicar al animal para reponer el carrete. Una hembra y cuatro machos fueron seguidos durante cinco días y los demás individuos durante 2-4 días. La distancia máxima de seguimiento de un individuo fue de 1.650 m a lo largo de cinco días. Para cada ruta de 350 m, los individuos visitaron un promedio de cinco cuevas, 0,5 termiteros, realizaron seis escarbaduras y llevaron a cabo 19 eventos de alimentación. Durante la primera jornada de seguimiento el recorrido fue relativamente lineal. Sin embargo, al realizar seguimientos en días consecutivos, las rutas se volvieron sinuosas. No enconregistrados. La conservación debe priorizar vedas a favor de las hembras, programas de divulgación con niños y cazadores locales y áreas protegidas sin presión de cacería. Palabras clave: nido Spool-and-thread tracking of the three-banded armadillo Tolypeutes matacus in the Bolivian ChacoAbstract The three-banded armadillo Tolypeutes matacus is a key prey species for indigenous subsistence hunters in the Bolivian Chaco, and is categorized as Vulnerable by the 2009 Bolivia Red Book. This study is burrow / nest use, and feeding behavior, 33 three-banded armadillos were tracked using a spool-and-thread mechanism attached to their carapace. Seventeen animals were followed for a single 350 m spool of thread, because the spool often emptied of thread before the night's activity was complete, and the animal could not -tinuous days, and the other individuals for 2-4 days. The maximum distance tracked by thread was 1,650 m sites, 0.5 termite nests, and summed 19 feeding bouts. Single-spool tracks tended towards linearity, whereas and males or between juveniles and adults for any of these behavioral aspects. Conservation must focus on male-biased harvests, environmental education with local children and hunters, and protected areas with no hunting.

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Movement and ranging patterns of a tropical rat (Leopoldamys sabanus) in logged and unlogged rain forests

Cited by 13 publications

References 44 publications

Impacts of tropical forest disturbance on species vital rates

Impacts of tropical forest disturbance on species vital rates

Assessing Sampling Biases in Logging Impact Studies in Tropical Forests

Seguimiento del Corechi (Tolypeutes matacus) por Medio de Carreteles de Hilo en el Chaco boliviano

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