scholarly journals Distribution, habitat characteristics and conservation status of lepidium hyssopifolium desv. (brassicaceae) in Tasmania

2018 ◽  
Vol 152 ◽  
pp. 33-52
Author(s):  
M Wapstra
Keyword(s):  
Conservation Status ◽  
Habitat Characteristics

Dietary composition of endangered seahorses determined by stable isotope analysis

2017 ◽  
Vol 68 (5) ◽  
pp. 831 ◽  
Author(s):  
S. Valladares ◽  
D. X. Soto ◽  
M. Planas
Keyword(s):  
Stable Isotope ◽  
Environmental Changes ◽  
Conservation Status ◽  
Management Strategies ◽  
Isotope Analysis ◽  
Primary Source ◽  
Habitat Characteristics ◽  
Conservation Actions ◽  
Isotope Mixing Models ◽  
North Western

The lack of integrated measures for assessing the feeding ecology of seahorses may restrict the effectiveness of conservation actions on wild populations of worldwide threatened seahorse species. Identifying dietary sources will allow researchers to determine their degree of vulnerability to environmental changes, redefine their conservation status and apply appropriate management strategies. The resource use of the seahorse Hippocampus guttulatus inhabiting coastal waters of Galicia (north-western Iberian Peninsula) was assessed for three populations and 2 years using stable isotope mixing models. The Bayesian mixing model (MixSIAR) estimated the relative contributions of the dietary sources to the seahorse diet and revealed that Caprellidea were the primary source, followed by Gammaridea and Caridea. Mysidae and Annelida represented the less dominant prey. This prey preference can be explained by the foraging behaviour of seahorses. Different contributions of Gammaridea and Caridea to the diet were found among sites, indicating different habitat characteristics and hence different habitat use by seahorses within each site. In addition, differences were encountered among sexes. Caprellidea was the dominant prey for females, whereas Gammaridea was the dominant prey for males. The findings of the present study will contribute to the knowledge of feeding patterns of H. guttulatus, providing relevant data for conservation of this endangered species.

scholarly journals Keanekaragaman Pari Hasil Tangkapan Nelayan di TPI Karangantu Banten

2021 ◽  
Vol 9 (3) ◽  
pp. 257-266
Author(s):  
Erreull Isyhadu Putri ◽  
◽  
Dinda Rizqi ◽  
Fenia Alya ◽  
Tia Azizah
Keyword(s):  
Species Diversity ◽  
Literature Review ◽  
Diversity Index ◽  
Conservation Status ◽  
Habitat Characteristics ◽  
Species Diversity Index ◽  
Interview Method

This study aims to determine the diversity of rays caught by fishermen in TPI Karangantu Banten. This research uses interview method and literature review. The discussion of the observations includes classification, habitat, characteristics, and conservation status. The results of this study indicate that there is a diversity of rays, namely the results of the families obtained from the observations are Rhinopteridae, Dasyatidae, and Gymnuridae). From the results of the calculation of the species diversity index using the Shannon Wiener formula, it is included in the medium category. This diversity can be used as knowledge and inventory for biodiversity, especially the chondrichthyes class in TPI Karangantu, Serang, Banten.

scholarly journals Monitoring and conservation of the rare orchid Didimoplexis verrucosa in the face of change

Bothalia ◽  
2021 ◽  
Vol 51 (2) ◽  
Author(s):  
T.H.C. Mostert ◽  
R.E. Mostert
Keyword(s):  
Conservation Status ◽  
Management Strategies ◽  
Population Monitoring ◽  
Environmental Indicators ◽  
Habitat Characteristics ◽  
Similar Degree ◽  
Suitable Habitat ◽  
Individual Plant ◽  
Accurate Identification ◽  
Term Survival

Abstract Background: Didymoplexis verrucosa is a cryptic leafless saprophytic ground orchid (~70 mm tall) growing on the coastal forest floors of southern Zululand and classified as Vulnerable (D2). As part of a population monitoring programme, 960 man-hours of species specific searching over five consecutive flowering seasons were conducted, yielding only one individual plant. Objective: The aim of this study was to increase detection rate by developing a profile of environmental indicators for the accurate identification of suitable habitat. Methods: A detailed description of suitable habitat was compiled based on the Braun-Blanquet approach. Results: The results showed that key attributes shared by localities include similar topographic position in the landscape, hydrology, soils, vegetation composition and structure, forest age, leaf-litter composition of the forest floor, the co-occurrence of Isoglossa woodii, and a similar degree of protection from sunlight, wind and desiccation. Significance of the findings: This profile of essential habitat characteristics can be used as a surrogate in the absence of actual locality data when identifying target conservation areas and compiling management strategies for this very cryptic species. A by-product of this habitat analysis was the discovery of a long list of impacts on the long term survival of D. verrucosa. The combination of these stochastic and deterministic events will drive habitat change at rates beyond the species’ ability to adapt. Managing these variables forms the crux of its successful conservation. A conservation status revision, based on the formal IUCN criteria, indicate that D. verrucosa should be reclassified as Critically Endangered Category B2a and D.  

scholarly journals Species of white-tailed forest rats hunted and traded, their conservation status and habitat characteristics, in North Sulawesi, Indonesia

2021 ◽  
Vol 22 (7) ◽  
Author(s):  
Sylvia Laatung ◽  
Asnath Maria Fuah ◽  
Burhanuddin Masy'ud ◽  
Cece Sumantri ◽  
Salundik Dohong
Keyword(s):  
Secondary Forest ◽  
Survey Methods ◽  
Conservation Status ◽  
Natural Habitat ◽  
Habitat Characteristics ◽  
General Survey ◽  
The Past ◽  
North Sulawesi ◽  
Areca Catechu ◽  
Piper Aduncum

Abstract. Laatung S, Fuah AM, Masy’ud B, Sumantri C, Salundik. 2021. Species of white-tailed forest rats hunted and traded, their conservation status and habitat characteristics, in North Sulawesi, Indonesia. Biodiversitas 22: 2778-2784. The tradition of hunting and trading white-tailed forest rats, especially in North Sulawesi, has been practiced for generations. This poses a threat to the existence of these animals in their natural habitat leading to the extinction of some hunted species. In the past, studies on white-tailed rats being hunted and traded on Sulawesi is still lacking. Therefore, the purpose of this study is to identify the species of white-tailed forest rats hunted and traded, their conservation status and habitat characteristics in North Sulawesi. This study was conducted in April to June 2018 in Minahasa and Bolaang Mongondow District, North Sulawesi. The survey methods used involved visiting hunters, recording and taking pictures of the species of rats being hunted and traded. All samples of white-tailed rats were identified in the Zoological Laboratory, Indonesian Institute of Sciences Cibinong Bogor, West Java. Furthermore, ascertaining the general characteristics of the habitat was carried out using a general survey in locations known as distribution areas in North Sulawesi. The identification of 125 individuals consists of 8 species of white-tailed forest rats from 7 genera, which are commonly hunted. They include Rattus xanthurus (Gray, 1867), Bunomy fratrorum (Thomas, 1896), Lenomys meyeri (Jentink, 1879), Paruromys dominator (Thomas, 1921), Echiotrix leucura (Gray, 1879), Taeromys taerae (Sody, 1932), Maxomys hellwaldi (Jentink, 1879) and Maxomys musschenbrooki (Jentink, 1878). Four out of the eight species of white-tailed forest rats are protected species according to the IUCN Redlist. The white-tailed forest rats identified in this study, were caught in secondary forest and plantation, ranging from an altitude of 500 - 1.500 meters above sea level. Their main sources of feed include Areca catechu, Piper aduncum, Ficus spp., and Arenga piñnata.

scholarly journals Changes In Distribution And Structure Of Wild Origanum Vulgare L. Populations During The Last Decade In Armenia And Implications For Conservation

2015 ◽  
Vol 2 ◽  
pp. 321
Author(s):  
Armine Abrahamyan
Keyword(s):  
Population Distribution ◽  
Conservation Status ◽  
Field Studies ◽  
Habitat Characteristics ◽  
Ex Situ ◽  
Limited Information ◽  
Native Plant ◽  
Native Plant Species ◽  
Anthropogenic Threats

Armenia has a strong interest in examining the biodiversity of native plant species and assessing their conservation status. Anthropogenic threats to this biodiversity such as overpopulation, deforestation and urbanization have simultaneously hindered research and increased the need for it. Only limited information on the genetic biodiversity, population location, structure and size, and conservation status of most of these species is, however, at this time available. During 2006-2009, field studies were conducted to re-locate populations of wild Melissa officinalis L. on the basis of historical (i.e. herbarium voucher) records, and to discover new populations. The growth, phenological and habitat characteristics of the plant, and overall populations size were assessed. GPS map of present and past population distribution were created. This research provided baseline data that can be used for the development of further ex situ and in vitro strategies to conserve unique genotypes, as well as to assess the sustainability of wild populations with regard to the IUCN Red Book Criteria, of this important medicinal and culinary species in Armenia.

scholarly journals Using no-take marine reserves as a tool for evaluating rocky-reef fish resources in the western Mediterranean

2013 ◽  
Vol 70 (3) ◽  
pp. 578-590 ◽  
Author(s):  
Josep Coll ◽  
Antoni Garcia-Rubies ◽  
Gabriel Morey ◽  
Olga Reñones ◽  
Diego Álvarez-Berastegui ◽  
...  
Keyword(s):  
Reef Fish ◽  
Carrying Capacity ◽  
Spatial Scales ◽  
Marine Reserves ◽  
Conservation Status ◽  
Western Mediterranean ◽  
Habitat Characteristics ◽  
Rocky Reef ◽  
Fish Resources ◽  
Rocky Reef Fish

Abstract Coll, J., Garcia-Rubies, A., Morey, G., Reñones, O., Álvarez-Berastegui, D., Navarro, O., and Grau, A. M. 2013. Using no-take marine reserves as a tool for evaluating rocky-reef fish resources in the western Mediterranean). - ICES Journal of Marine Science, 70: 578–590. The use of MPAs to recover fish stocks in littoral areas of the western Mediterranean has made it possible to obtain time dataseries on the biomass evolution over the last decade. The biomass of six fully protected MPAs increased between two- and threefold over a period of five years. After this time the biomass remained stable. This pattern allowed us to adjust logistic curves between the biomass and protection time, and to estimate the carrying capacity (K) of each site. In the present study we investigate the relationships between carrying capacity (K) and habitat characteristics at each protected site. The relationships between habitat/environmental variables and K are analysed by applying generalized linear models. Environmental descriptors showing major effects on biomass are related to depth, exposure, rugosity, and offshore slope at different spatial scales. Comparison of observed and predicted values using the model for exploited sites in the Balearic Islands made it possible to determine their conservation status. This empirical approach to the relationships between environmental factors and fish assemblage biomass could constitute a very useful tool when traditional fishery management based on catch and effort data from the artisanal and recreational fleets is difficult to apply.

A new subspecies of Iberis saxatilis (Brassicaceae) from Turkey

Phytotaxa ◽  
2017 ◽  
Vol 306 (2) ◽  
pp. 153 ◽  
Author(s):  
DILEK OSKAY
Keyword(s):  
Conservation Status ◽  
Habitat Characteristics ◽  
New Subspecies ◽  
Diagnostic Characters ◽  
Local Endemic

Iberis saxatilis subsp. magnesiana Oskay subsp. nov. is identified as a new subspecies from Kocasivri Mt. (Manisa), west Anatolia, Turkey. Iberis saxatilis subsp. magnesiana is a local endemic, most similar to Iberis saxatilis L. subsp. saxatilis. Diagnostic characters of these related taxa are discussed. Habitat characteristics, distribution and conservation status of the new subspecies are also presented.

scholarly journals Current status and conservation strategies for Isoetes in China: a case study for the conservation of threatened aquatic plants

Oryx ◽  
2005 ◽  
Vol 39 (3) ◽  
pp. 335-338 ◽  
Author(s):  
Xing Liu ◽  
Jing-Yuan Wang ◽  
Qing-Feng Wang
Keyword(s):  
Habitat Degradation ◽  
Conservation Status ◽  
Mainland China ◽  
Iucn Red List ◽  
Habitat Characteristics ◽  
Wild Plants ◽  
Current Status ◽  
Conservation Strategies ◽  
The Government

There are four known species of Isoetes (Family Isoetaceae) from China: I. hypsophila, I. sinensis and I. yunguiensis on the mainland, and I. taiwanensis on Taiwan. In a 4-year study we documented the distribution and habitat characteristics of all four species and evaluated their conservation status using IUCN criteria. All four species are facing a high risk of extinction and should be categorized as Critically Endangered on the IUCN Red List. Habitat degradation and loss, water pollution and eutrophication, competitive exclusion, and human disturbance are the main factors causing the decline and extirpation of Isoetes. Only I. taiwanensis is protected in situ in Yangmingshan National Park on Taiwan. None of the species or habitats of Isoetes on mainland China are presently protected, although all species have been designated by the government as State Key Protected Wild Plants. Our results suggest that conservation strategies should be implemented urgently, particularly on the mainland.

scholarly journals The status and conservation of the Blue-Throated Macaw Ara glaucogularis

2000 ◽  
Vol 10 (3) ◽  
pp. 255-275 ◽  
Author(s):  
Alan J. Hesse ◽  
Giles E. Duffield
Keyword(s):  
Central Government ◽  
Conservation Status ◽  
Basic Research ◽  
Habitat Characteristics ◽  
Current Conservation ◽  
Ecological Requirements ◽  
The Status ◽  
Savanna Burning ◽  
Live Bird

The conservation status of the Blue-throated Macaw Ara glaucogularis, a Bolivian endemic, is assessed using the most recent information available. The known range of the species is patchily distributed within an 8,600 km2 area of lowland savanna–forest habitat in the Beni department, under private ownership for cattle ranching, which is the main form of land use in the region. Population surveys of the Blue-throated Macaw revealed this species to exist in very low numbers. The immediate threat to the species is illegal trapping for the live bird trade. Effects of cattle grazing and savanna burning may modify habitat characteristics, but there is no direct evidence suggesting that these factors negatively influence the ecological requirements of Ara glaucogularis. The species is highly associated with the Attalea phalerata palm, which it uses for feeding and nesting. Current conservation efforts include: population and distribution surveys and assessment of habitat requirements; environmental awareness targeted at landowners and ranch personnel; collaboration with subnational and central government bodies; and development of strategies to curtail parrot trafficking activities. Recommendations for the long-term conservation of the species include increasing the involvement of landowners to strengthen protection for wild macaws; working with the Bolivian government on strategies to curb macaw trafficking; increasing environmental education activities with local inhabitants; basic research on breeding requirements and limitations of wild Blue-throated Macaws; and investigating the application of private reserves to the Blue-throated Macaw range.

Sign in / Sign up

Export Citation Format

Share Document