Assessing the conservation status of species with limited available data and disjunct distribution

Pena, João Carlos; Kamino, Luciana Hiromi Yoshino; Rodrigues, Marcos; Mariano‐Neto, Eduardo; Siqueira, Marinez Ferreira de

doi:10.1016/j.biocon.2013.12.015

Cited by 66 publications

(53 citation statements)

References 38 publications

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“…Our results demonstrated the greatest extent of typical cerrado tree species in the LIG, the greatest contraction in the LGM, and a subsequent re‐expansion in the Holocene. The values obtained by TSS and AUC modelling suggest that the environmental variables used in our models provided important information on the distribution of the tree species selected as indicators of typical cerrado vegetation, and were higher than those obtained by other studies modelling the climatic distribution of neotropical vegetation (Carnaval and Moritz , Werneck et al , , Pena et al ), but which did not model individual indicator species. The indicator species method has been widely and effectively used to determine ecological indicators of community types, habitat conditions, and environmental changes (Dufrêne and Legendre , Carignan and Villard , Niemi and McDonald , De Cáceres and Legendre , De Cáceres et al , ).…”

Section: Discussioncontrasting

confidence: 69%

Effects of Quaternary climatic fluctuations on the distribution of Neotropical savanna tree species

et al. 2016

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In order to develop niche models for tree species characteristic of the cerrado vegetation (woody savannas) of central South America, and to hindcast their distributions during the Last Glacial Maximum and Last Inter‐Glacial, we compiled a dataset of tree species checklists for typical cerrado vegetation (n = 282) and other geographically co‐occurring vegetation types, e.g. seasonally dry tropical forest (n = 355). We then performed an indicator species analysis to select ten species that best characterize typical cerrado vegetation and developed niche models for them using the Maxent algorithm. We used these models to assess the probability of occurrence of each species across South America at the following time slices: Current (0 ka pre‐industrial), Holocene (6 ka BP), Last Glacial Maximum (LGM – 21 ka BP), and Last Interglacial (LIG – 130 ka BP). The niche models were robust for all species and showed the highest probability of occurrence in the core area of the Cerrado Domain. The palaeomodels suggested changes in the distributions of cerrado tree species throughout the Quaternary, with expansion during the LIG into the adjacent Amazonian and Atlantic moist forests, as well as connections with other South American savannas. The LGM models suggested a retraction of cerrado vegetation to inter‐tableland depressions and slopes of the Central Brazilian Highlands. Contrary to previous hypotheses, such as the Pleistocene refuge theory, we found that the widest expansion of cerrado tree species seems to have occurred during the LIG, most probably due to its warmer climate. On the other hand, the postulated retractions during the LGM were likely related to both decreased precipitation and temperature. These results are congruent with palynological and phylogeographic studies in the Cerrado Domain.

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Section: Discussioncontrasting

confidence: 69%

Effects of Quaternary climatic fluctuations on the distribution of Neotropical savanna tree species

et al. 2016

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“…The estimates of the geographic range extent obtained by ENM techniques have proved to be more representative than those obtained by traditional methods (e.g. minimum convex polygon (MCP)), particularly when data are scarce or when species are rare (Marcer et al, 2013; Pena et al, 2014; Syfert et al, 2014); and also avoid potential subjective bias of experts (Fourcade et al, 2013). We used a minimum threshold (Anderson, Lew & Peterson, 2003) to convert raw model outputs (i.e.…”

Section: Methodsmentioning

confidence: 99%

Environmental, land cover and land use constraints on the distributional patterns of anurans:Leptodacylusspecies (Anura, Leptodactylidae) from Dry Chaco

Medina

Ponssa

Aráoz

2016

PeerJ

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Subtropical dry forests are among the most vulnerable biomes to land transformation at a global scale. Among them, the Dry Chaco suffers an accelerated change due to agriculture expansion and intensification. The Dry Chaco ecoregion is characterized by high levels of endemisms and species diversity, which are the result of a variety of climates and reliefs, allowing a wide variety of environments. The amphibian group exhibits a high richness in the Dry Chaco, which has been barely studied in relation to land cover changes. We used ecological niche models (ENMs) to assess the potential geographic distribution of 10 Leptodactylus species (Anura, Leptodactylidae), which are mainly distributed within the Dry Chaco. We characterized these distributions environmentally, analyzed their overlap with land cover classes, and assessed their diversity of ecoregions. Also, we evaluated how these species potential distribution is affected by the transformation of land, and quantified the proportional area of the potential distribution in protected areas. We found that temperature seasonality is the main constraint to the occurrence of the species studied, whose main habitats are savannas, grasslands and croplands. The main threats to these species are the effects of climate change over spatial patterns of seasonality, which could affect their breeding and reproduction mode; the loss of their natural habitat; the exposure to contaminants used by intensive agriculture and their underrepresentation in protected areas.

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“…The International Union for Conservation of Nature (IUCN) protocol for vulnerability analysis (IUCN 2001) uses the term extension of occurrence (EOO) for the range distribution of a particular species. Other model developers have interpreted the SDM predicted distribution as a surrogate for the EOO (Sergio et al 2007, Tarrant and Armstrong 2013, Pena et al 2014, thereby giving a broad meaning to the vulnerability analysis. Therefore, we tentatively use those categories to evaluate D. nigra vulnerability because the IUCN (2001) supports the use of predicted distributions.…”

Section: Vulnerability Analysismentioning

confidence: 99%

Modeling the distribution of a rare Amazonian odonate in relation to future deforestation

et al. 2015

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Assessing the conservation status of species with limited available data and disjunct distribution

Cited by 66 publications

References 38 publications

Effects of Quaternary climatic fluctuations on the distribution of Neotropical savanna tree species

Effects of Quaternary climatic fluctuations on the distribution of Neotropical savanna tree species

Environmental, land cover and land use constraints on the distributional patterns of anurans:Leptodacylusspecies (Anura, Leptodactylidae) from Dry Chaco

Modeling the distribution of a rare Amazonian odonate in relation to future deforestation

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