Are the IUCN standard home-range thresholds for species a good indicator to prioritise conservation urgency in small islands? A case study in the Canary Islands (Spain)

Martin, José

doi:10.1016/j.jnc.2008.10.001

Cited by 54 publications

(46 citation statements)

References 40 publications

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“…First, the IUCN database may underestimate the numbers of taxa in the two categories considered: roughly 82% of the EN and 74% of the CR taxa included in the global analysis correspond to assessments made in 1998, and need updating. Further, the red-list criteria may not readily detect changes from naturally small sizes and ranges to critical states (Martín, 2009). For instance, the proportion of CR+ EN endemics is higher on the focal archipelagos that have red lists (30-75%, Table 2) than on the 53 island groups included in the global analysis (average 28%).…”

mentioning

confidence: 99%

Conservation of oceanic island floras: Present and future global challenges

Caujapé‐Castells

Tye

Crawford

et al. 2010

Perspectives in Plant Ecology, Evolution and Systematics

311

228

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mentioning

confidence: 99%

Conservation of oceanic island floras: Present and future global challenges

Caujapé‐Castells

Tye

Crawford

et al. 2010

Perspectives in Plant Ecology, Evolution and Systematics

311

228

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“…It can be applied virtually to any angiosperm species reported in a checklist of taxa that have undergone an extinction risk assessment. It can be applied to the IUCN Red List of Threatened Species TM independently from its limits in global states of conservation (Martín, 2009). The SHARP procedure can be applied also to the priority lists of species obtained using together criteria of species rarity and of habitat vulnerability (Gauthier et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

Identification of Bottlenecks in the Plant Life Cycle for Sustainable Conservation of Rare and Endangered Species

Aronne

2017

Front. Ecol. Evol.

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Long term survival of a species relies on maintenance of genetic variability and natural selection by means of successful reproduction and generation turnover. Although, basic to monitor the conservation status of a plant species, life history data are rarely available even for threatened species due to the gap between the large amount of information required and the limits in terms of time and available economic resources to gather these data. Here, the focus on bottlenecks in life-cycle of rare endangered plant species is proposed as a resolving approach to address the challenges of feasible conservation actions. Basic considerations for this approach are: (a) all biological and ecological studies on plant species can be scientifically important, but not all of them are equally relevant to conservation planning and management requirements; (b) under a changing environment, long term survival of a species relies on generation turnover; (c) for conservation purposes, priority should be given to studies aimed to focus on bottlenecks in the succession of generations because they prevent, or slow down natural selection processes. The proposed procedure, named Systematic Hazard Analysis of Rare-endangered Plants (SHARP), consists of a preliminary survey of the already available information on the species and two main components. The first component is the identification of the bottlenecks in the life cycle by means of field surveys. The second is the diagnosis of the causes of the bottleneck by appropriate experimental methods. The target is to provide researchers, managers and practitioners with substantiated indications for sustainable conservation measures.

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“…However, the threshold values do not seem appropriate for many taxa. Organisms with small body sizes usually require much smaller areas than organisms with larger body sizes, and invertebrates typically have smaller ranges than vertebrates, with plants presenting intermediate values (Gaston, 2003;Martín, 2009). Especially among island endemics (Martín, 2009) and troglobionts, many species meet some threshold of criterion B, including many vertebrates, even if they are naturally rare and not, therefore, necessarily endangered.…”

Section: Geographic Range -Criterion Bmentioning

confidence: 99%

“…A further consequence of this paradox is that almost all species that were possible to be evaluated, even species considered a priori as common and non-endangered, were classified as at risk, most commonly as Critically Endangered. This is more evident for the island species, which could create the ''island artefact'' (overestimation of risk) because the small size of islands manifests in most single-island endemic species being easily classified into one of the IUCN categories (Martín, 2009). The adequacy of the current criteria is therefore also compromised.…”

Section: Feasibility and Adequacy Of Species Evaluationsmentioning

confidence: 99%

Adapting the IUCN Red List criteria for invertebrates

Cardoso

Borges

Triantis

et al. 2011

Biological Conservation

Self Cite

210

167

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a b s t r a c tThe IUCN Red List is the most useful list of species that are at risk for extinction worldwide, as it relies on a number of objective criteria. Nevertheless, there is a taxonomic bias that excludes species with small body sizes, narrow distribution ranges and low dispersal abilities, which constitute the vast majority of the planet's biota, particularly local endemics.By evaluating each IUCN criterion separately, we (i) identify the shortcomings for invertebrate applications, (ii) explain how risk categories may be wrongly applied due to inapplicable and/or misleading thresholds, (iii) suggest alternative ways of applying the existing criteria in a more realistic way and (iv) suggest possible new criteria that were not considered in the current evaluation framework but that could allow a more comprehensive and effective assessment of invertebrates.By adapting the criteria to rely more explicitly on the Area of Occupancy and the Extent of Occurrence, their respective trends and by using ecological modelling methods, the criteria's applicability would be increased. The change in some thresholds or, eventually, the creation of sub-categories would further increase their adequacy. Additionally, co-extinction could be introduced as an explicit part of the classification process.As a case study, we evaluated 48 species of Azorean arthropods and Iberian spiders according to the current criteria. More than one-quarter (27%) of all evaluated species were classified as Critically Endangered, 19% as Endangered, 6% as Vulnerable and 8% as Least Concern. The remaining 40% did not have enough data to reach a classification.

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Are the IUCN standard home-range thresholds for species a good indicator to prioritise conservation urgency in small islands? A case study in the Canary Islands (Spain)

Cited by 54 publications

References 40 publications

Conservation of oceanic island floras: Present and future global challenges

Conservation of oceanic island floras: Present and future global challenges

Identification of Bottlenecks in the Plant Life Cycle for Sustainable Conservation of Rare and Endangered Species

Adapting the IUCN Red List criteria for invertebrates

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