Rare7: An R package to assess the forms of rarity in a community

Maciel, Everton A.; Arlé, Eduardo

doi:10.1016/j.ecolind.2020.106419

Cited by 9 publications

(5 citation statements)

References 35 publications

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“…2) and scatter plots (Fig. 3) were generated by using the rrindex package (Maciel, 2021b) in R programming language version 4.0.3 (CoreTeam, 2020).…”

Section: Data Collectionmentioning

confidence: 99%

Local rarity of vascular plants in a human-dominated landscape of Northern Ethiopia

Yaynemsa

Woldu²,

Demissew³

2023

Israel J. Ecol. Evol.

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Understanding species rarity is crucial in developing conservation priorities by reasonably allocating limited funds effectively. The local rarity of vascular plants in the Abune Yosef mountain range in Ethiopia was assessed using Rabinowitz’s seven forms of rarity. Of the 199 vascular species analyzed for rarity, 171 species (86%) were rare. On the contrary, only 28 species (14%) were found to be common in the study area. The rarity index (rr) ranged from 0.46 to 1. On the other hand, species range (gri), total density of mature individuals (psi), and Habitat specificity (hsi) ranges were 0.99–1, 0–1, and 0.04–1, respectively. Land transformation was identified as likely the main driver for rarity in the study area. The characterization of the plant species of the Abune Yosef mountain range provided here can be used in the management of this threatened landscape and provide a basis for broader national-level conservation efforts of plants within the biodiverse landscapes of Ethiopia.

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“…2) and scatter plots (Fig. 3) were generated by using the rrindex package (Maciel, 2021b) in R programming language version 4.0.3 (CoreTeam, 2020).…”

Section: Data Collectionmentioning

confidence: 99%

Local rarity of vascular plants in a human-dominated landscape of Northern Ethiopia

Yaynemsa

Woldu²,

Demissew³

2023

Israel J. Ecol. Evol.

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“…only one record). The second method is based on Rabinowitz's approach (Rabinowitz et al, 1984) as implemented in the "Rare7" R package (Maciel and Arlé, 2020), which employs a combination of three parameters to evaluate species' rarity: (1) geographic range, (2) population abundance, and (3) habitat breadth. The combination of these three parameters results in the classification of a species as either common or as one of seven types of increasing rarity.…”

Section: Species Richness and Raritymentioning

confidence: 99%

“…S3). (Maciel and Arlé, 2020), The index provides a classification of a species as either common or as one of seven types of increasing rarity. Species abbreviations as in Table 2.…”

Section: Species Associationmentioning

confidence: 99%

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Diversity, distribution, habitat preferences and community assemblages of Amphibians and Reptiles in the “Cilento, Vallo di Diano e Alburni” National Park (Campania, Southern Italy)

Romano,

Sansone,

Cacace

et al. 2023

Acta Herpetol.

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Amphibians and reptiles are important ecological indicators of ecosystem status and play significant ecological roles. However, their populations are declining globally due to factors such as climate and land-use change. To effectively manage these species, it is crucial to study their distribution in protected areas. In this study, we provide new information on the distribution and ecology of amphibians and reptiles in the “Cilento, Vallo di Diano e Alburni” (CVDA) National Park in southern Italy. We used a comprehensive dataset consisting of 2465 records obtained from fieldwork, citizen science, and literature to evaluate species’ rarity, habitat preferences and community assemblage. We investigated whether differences in species richness across different habitat types and elevations resulted from species selection of different environmental conditions. We quantified species probability of observation in different habitat types and estimated the significance of species-habitat associations. Species rarity was assessed by considering geographic range, population abundance, and habitat breadth. Collected data substantially improved knowledge of the distribution of numerous species compared to published data. Our findings are generally consistent with the species’ ecological information available in Italy, but we also found some species’ peculiar ecological aspects that are little-known. The CVDA National Park emerges as an effective protected area that ensures good conservation status of the herpetofauna, also in the case of species showing population and range declines at the national scale.

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“…Beyond the abundance of species, rarity is a multidimensional concept and is described in seven forms of species rarity, relating to geographic range (restricted or widely distributed), local population density (abundance based and small or large populations), and habitat specialization (specialist or generalist), as well as combinations of these (Rabinowitz 1981). The purpose of the geographic range is to assign a species based on the area where it was found relative to a sampled area (Maciel and Arlé 2020). To classify species as habitat specialists and generalists, habitat specificity is utilized to detect the habitat preference of a species for a kind of habitat or microhabitat (Vitt 1981).…”

Section: Introductionmentioning

confidence: 99%

Assessment of rarity and ecological preferences of the non-marine ostracods (Crustacea) in Çanakkale Province (Türkiye)

Yavuzatmaca,

Külköylüoğlu,

Ataman

et al. 2024

Aquat Sci

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Rarity as a multidimensional concept has not been discussed for the ostracods along with the effects of physicochemical factors and sedimentation rates of waters on their distribution. We randomly sampled 91 aquatic sites including eight habitat types in the Çanakkale Province to study ostracod species rarity, commonness, and ecological preferences, and to test the relationships between the rarity index (average of geographic range, habitat specificity, and population size indices) and environmental factors. A total of 44 ostracod taxa (25 living) were reported from 75 sites. Among the species, Candonocypris caledonica was recorded for the first time in Türkiye. Sixty percent of 25 living species exhibited cosmopolitan characteristics, making significant contributions to the diversity of ostracods. The well-known cosmopolitan species, Heterocypris salina (rr = 0.268), Cypridopsis vidua (rr = 0.289), Limnocythere inopinata (rr = 0.330), Ilyocypris bradyi (rr = 0.370), and Psychrodromus olivaceus (rr = 0.390), were identified as common species based on the rarity index (rr) values. Of the environmental variables, only sediment grain sizes (×2000, ×500, and ×63 μm) were found to be effective on the distribution of ostracod species. The Shannon index exhibited a positively significant association with ×2000, while the population size index displayed a linear relationship with ×63 μm grain size, indicating a small population size and rarity. Associations among index values, sediment grain size, and water quality variables showed that comprehensive studies on ostracods, analyzing both water and sediment, can provide a clearer and more precise information for evaluating the rarity and ecological preferences of species.

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Rare7: An R package to assess the forms of rarity in a community

Cited by 9 publications

References 35 publications

Local rarity of vascular plants in a human-dominated landscape of Northern Ethiopia

Local rarity of vascular plants in a human-dominated landscape of Northern Ethiopia

Diversity, distribution, habitat preferences and community assemblages of Amphibians and Reptiles in the “Cilento, Vallo di Diano e Alburni” National Park (Campania, Southern Italy)

Assessment of rarity and ecological preferences of the non-marine ostracods (Crustacea) in Çanakkale Province (Türkiye)

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