scholarly journals Effects of Habitat Loss on the Ecology of Pachyphytum caesium (Crassulaceae), a Specialized Cliff-Dwelling Endemic Species in Central Mexico

Diversity ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 421
Author(s):  
Ricardo Clark-Tapia ◽  
Gabriel González-Adame ◽  
Jorge E. Campos ◽  
Victor Aguirre-Hidalgo ◽  
Nelly Pacheco-Cruz ◽  
...  
Keyword(s):  
Plant Species ◽  
Habitat Loss ◽  
Rock Climbing ◽  
Small Populations ◽  
Population Abundance ◽  
Human Disturbances ◽  
Chemical Soil ◽  
Sport Activities ◽  
Abundance And Distribution ◽  
Effects Of Land Use

Cliff-dwelling plant species are highly specialized and adapted to a vulnerable, fragmented, and are mostly endemic, narrowly-distributed and threatened. As a contribution to the conservation efforts of endemic cliff-dwelling species, this study provides an overview of the effects of habitat loss on the abundance and distribution of Pachyphytum caesium (Crassulaceae) due to human disturbances. To achieve this objective, we first conducted a retrospective analysis from 2003–2013 to assess the effects of land use change on the abundance of P. caesium. Secondly, we estimate the abundance and distribution of P. caesium throughout the study area, as well as analyze the effect of rock-climbing activities on the density and population structure of P. caesium. The results suggest differences in population abundance among sites is due to the adverse effects of habitat loss. P. caesium presents a very restricted distribution with small and fragmented populations. In addition, guava agriculture has a significant impact on the chemical soil properties of the hillsides, causing a significant effect on the occurrence of P. caesium, while sport activities remove both the soil and the plants from the cliffs. According to the results, P. caesium is classified as a plant species with extremely small populations (PSESP), and it is highly vulnerable to habitat disturbance. Its conservation is thus a priority to ensure its permanence.

scholarly journals The Draft Genome Assembly of the Critically Endangered Nyssa yunnanensis, a Plant Species with Extremely Small Populations Endemic to Yunnan Province, China

2020 ◽  
Author(s):  
Weixue Mu ◽  
Jinpu Wei ◽  
Ting Yang ◽  
Yannan Fan ◽  
Le Cheng ◽  
...  
Keyword(s):  
Plant Species ◽  
Tree Species ◽  
Yunnan Province ◽  
De Novo ◽  
Higher Plants ◽  
Draft Genome ◽  
Critically Endangered ◽  
Deciduous Tree ◽  
Conservation Strategies ◽  
Small Populations

Nyssa yunnanensis is a deciduous tree in family Nayssaceae within the order Cornales. As only 8 individuals in 2 sites recorded in Yunnan province of China, the species was listed as the China’s national grade-I protection species in 1999, and also as one of 120 PSESP(Plant Species with Extremely Small Populations) in Implementation Plan of Rescuing and Conserving China’s Plant Species with extremely Small Populations(PSESP) (2011-2-15). N. yunnanensis was also been evaluated as Critically Endangered in IUCN red list and Threatened Species List of China's Higher Plants. Hence understanding the genomic characteristics of this highly endangered Tertiary relict tree species is essential, especially for developing conservation strategies. Here we sequenced and annotated the genome of N. yunnanensis using 10X genomics linked-reads sequencing data. The de novo assembled genome is 1474Mb in length with a scaffold N50 length of 985.59kb. We identified 823.51Mb of non-redundant sequence as repetitive elements and annotated 39,803 protein-coding genes in the assembly. Our result provided the genomic characteristics of N. yunnanensis, which will provide valuable resources for future genomic and evolutionary studies, especially for conservation biology studies of this extremely threatened tree species.

scholarly journals Assessment of the Potential Risk of Rock-Climbing for Cliff Plant Species and Natural Protected Areas of Spain

2021 ◽  
Vol 9 ◽  
Author(s):  
Indradatta deCastro-Arrazola ◽  
Martí March-Salas ◽  
Juan Lorite
Keyword(s):  
Protected Areas ◽  
Plant Species ◽  
Potential Risk ◽  
Field Studies ◽  
Rock Climbing ◽  
Future Research ◽  
Small Scale ◽  
Potential Threat ◽  
Natural Protected Areas ◽  
Priority Species

In recent years, the popularity of rock-climbing has grown tremendously, setting an increasing pressure on cliff habitats. Climbing may be particularly harmful in the Mediterranean biome due to its appropriate environmental conditions for climbing. A few studies have identified the effect of climbing on plant diversity at a small-scale (namely locally or even just in specific climbing areas). However, no studies exist assessing the potential risk of rock-climbing on a broad-scale (e.g., regional or national). The study aims to identify the priority locations and priority cliff plant species in Spain to focus future study efforts. Spain was selected because it is a plant biodiversity hotspot, with a great diversity of endemic and endangered species, and one of the most popular destinations for climbers. We used a geographic information system-based approach to model the spatial concurrence among Spanish climbing areas (and climbing intensity), natural protected areas (NPAs), and distribution of threatened cliff plants (and their IUCN threat category). We found that 53.5% of climbing areas in Spain are located within a NPA, most of them falling into NPAs of medium protection level. We mapped 151 threatened cliff plants, identifying four medium priority Mediterranean locations and eight priority species in which future research efforts should be focused. High-priority study locations are absent in Spain according to our spatial modeling. For the first time on a national scale, this study identifies areas in which climbing represents a potential threat for cliff habitats and threatened plants. These findings contribute to designing field studies on the effects of rock-climbing on Mediterranean cliffs, laying the groundwork for a sustainable, yet challenging, balance between the protection of these unique habitats and rock-climbing.

Population abundance and distribution of the endangered golden langur (Trachypithecus geei, Khajuria 1956) in Bhutan

Primates ◽  
2019 ◽  
Vol 60 (5) ◽  
pp. 437-448 ◽  
Author(s):  
Phuntsho Thinley ◽  
Tshewang Norbu ◽  
Rajanathan Rajaratnam ◽  
Karl Vernes ◽  
Kezang Wangchuk ◽  
...  
Keyword(s):  
Population Abundance ◽  
Abundance And Distribution ◽  
Golden Langur

scholarly journals Rescuing Christensenia aesculifolia (Marattiaceae), a plant species with an extremely small population in China

Oryx ◽  
2018 ◽  
Vol 53 (3) ◽  
pp. 436-438
Author(s):  
Lei Cai ◽  
Guiliang Zhang ◽  
Jianying Xiang ◽  
Zhiling Dao ◽  
Weibang Sun
Keyword(s):  
Plant Species ◽  
Small Population ◽  
Provincial Government ◽  
South East Asia ◽  
Small Populations ◽  
Species Status ◽  
Field Surveys ◽  
Field Investigations ◽  
Threatened Habitat ◽  
Extant Population

AbstractThe rare and threatened fern Christensenia aesculifolia of South-east Asia is listed in China as a second-ranked plant for national protection and is also categorized as one of 62 plant species with extremely small populations by the Yunnan provincial government. Field investigations during 2014–2017 failed to relocate one previously known population, and revealed that the single known extant population of C. aesculifolia contains only 10 individual plants. The most urgent conservation requirement for this species is to conserve the threatened habitat of the remnant population. Further field surveys and research are also required for an improved understanding of the species’ status.

scholarly journals The processes that threaten Indonesian plants

Oryx ◽  
2011 ◽  
Vol 45 (2) ◽  
pp. 172-179 ◽  
Author(s):  
Sugeng Budiharta ◽  
Didik Widyatmoko ◽  
Irawati ◽  
Harry Wiriadinata ◽  
Rugayah ◽  
...  
Keyword(s):  
Plant Species ◽  
Habitat Loss ◽  
Biological Factors ◽  
Threatened Plants ◽  
Comprehensive Review ◽  
Natural Factors ◽  
Plant Groups ◽  
Threatening Processes

AbstractThe processes that threaten 240 Indonesian threatened plants were identified and categorized based on a comprehensive review of the published literature and elicitation of information from experts. Intrinsic biological factors and habitat loss are the major causes of plant endangerment in Indonesia (affecting 83 and 82% of species respectively), followed by overexploitation (64%) and natural factors (6%). The dominant threats vary between major plant groups, with habitat loss being particularly important for palms and trees, and biological factors important for orchids. For all studied plant species three sets of inter-related threatening processes (threat syndromes) were identified that differed among the major plant groups. By identifying and evaluating the processes that threaten plants in Indonesia we provide knowledge to guide their future conservation.

scholarly journals Effects of extreme land fragmentation on wildlife and livestock population abundance and distribution

2016 ◽  
Vol 34 ◽  
pp. 151-164 ◽  
Author(s):  
Mohammed Y. Said ◽  
Joseph O. Ogutu ◽  
Shem C. Kifugo ◽  
Ogeli Makui ◽  
Robin S. Reid ◽  
...  
Keyword(s):  
Population Abundance ◽  
Land Fragmentation ◽  
Livestock Population ◽  
Abundance And Distribution
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