scholarly journals Large carnivore habitat suitability modelling for Romania and associated predictions for protected areas

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e6549 ◽  
Author(s):  
Bogdan Cristescu ◽  
Csaba Domokos ◽  
Kristine J. Teichman ◽  
Scott E. Nielsen
Keyword(s):  
Protected Areas ◽  
Habitat Suitability ◽  
Forest Type ◽  
National Level ◽  
Natura 2000 ◽  
Habitat Characteristics ◽  
Suitable Habitat ◽  
Lynx Lynx ◽  
Landscape Characteristics ◽  
Traffic Volumes

Habitat characteristics associated with species occurrences represent important baseline information for wildlife management and conservation, but have rarely been assessed for countries recently joining the EU. We used footprint tracking data and landscape characteristics in Romania to investigate the occurrence of brown bear (Ursus arctos), gray wolf (Canis lupus) and Eurasian lynx (Lynx lynx) and to compare model predictions between Natura 2000 and national-level protected areas (gap analysis). Wolves were more likely to occur where rugged terrain was present. Increasing proportion of forest was positively associated with occurrence of all large carnivores, but forest type (broadleaf, mixed, or conifer) generally varied with carnivore species. Areas where cultivated lands were extensive had little suitable habitat for lynx, whereas bear occurrence probability decreased with increasing proportion of built areas. Pastures were positively associated with wolf and lynx occurrence. Brown bears occurred primarily where national roads with high traffic volumes were at low density, while bears and lynx occurred at medium-high densities of communal roads that had lower traffic volumes. Based on predictions of carnivore distributions, natural areas protected in national parks were most suitable for carnivores, nature parks were less suitable, whereas EU-legislated Natura 2000 sites had the lowest probability of carnivore presence. Our spatially explicit carnivore habitat suitability predictions can be used by managers to amend borders of existing sites, delineate new protected areas, and establish corridors for ecological connectivity. To assist recovery and recolonization, management could also focus on habitat predicted to be suitable but where carnivores were not tracked.

Identifying Potential Habitat for the Endangered Aleutian Shield Fern Using Topographical Characteristics

2012 ◽  
Vol 3 (2) ◽  
pp. 303-310
Author(s):  
Adam Duarte ◽  
Daniel M. Wolcott ◽  
T. Edwin Chow ◽  
Mark A. Ricca
Keyword(s):  
Habitat Suitability ◽  
Habitat Characteristics ◽  
Geographical Information ◽  
Slope Aspect ◽  
Suitable Habitat ◽  
Gis Model ◽  
Potential Habitat ◽  
Suitability Map ◽  
Habitat Suitability Map ◽  
The U.S

Abstract The Aleutian shield fern Polystichum aleuticum is endemic to the Aleutian archipelago of Alaska and is listed as endangered pursuant to the U.S. Endangered Species Act. Despite numerous efforts to discover new populations of this species, only four known populations are documented to date, and information is needed to prioritize locations for future surveys. Therefore, we incorporated topographical habitat characteristics (elevation, slope, aspect, distance from coastline, and anthropogenic footprint) found at known Aleutian shield fern locations into a Geographical Information System (GIS) model to create a habitat suitability map for the entirety of the Andreaonof Islands. A total of 18 islands contained 489.26 km2 of highly suitable and moderately suitable habitat when weighting each factor equally. This study reports a habitat suitability map for the endangered Aleutian shield fern using topographical characteristics, which can be used to assist current and future recovery efforts for the species.

scholarly journals Environmental requirements for three sea pen species: relevance to distribution and conservation

2014 ◽  
Vol 72 (2) ◽  
pp. 576-586 ◽  
Author(s):  
C. Greathead ◽  
J. M. González-Irusta ◽  
J. Clarke ◽  
P. Boulcott ◽  
L. Blackadder ◽  
...  
Keyword(s):  
Protected Areas ◽  
Marine Protected Areas ◽  
Habitat Suitability ◽  
Environmental Variables ◽  
Suitable Habitat ◽  
Habitat Suitability Index ◽  
Suitability Index ◽  
Environmental Requirements ◽  
Adequacy Criterion ◽  
Suitable Area

Abstract The aim is to determine the environmental requirements, estimate the extent of suitable habitat for three sea pen species, and assess the implications for marine protected areas (MPAs). The sea pen Funiculina quadrangularis and the habitat associated with two further sea pen species, Virgularia mirabilis and Pennatula phosphorea, are of key conservation importance and are recommended for protection within MPAs. This study models their potential distributions using the MAXimum ENTropy algorithm and assesses these in relation to five possible marine protected areas (pMPAs) proposed for Scottish waters. Metrics relevant to assessing the efficacy of MPAs are also presented. Four environmental variables of prime importance for predicting the presence of all three species of sea pen were identified: mud, minimum salinity, depth, and gravel. The habitat suitability index increased with mud content. The modelled distribution of F. quadrangularis indicated a deeper distribution than V. mirabilis or P. phosphorea and was not present in sediment with gravel content above 30%. Pennatula phosphorea had the smallest area of suitable habitat, while V. mirabilis had the largest. The percentage predicted suitable area for each species that was encompassed by the five pMPAs ranged from 11% for F. quadrangularis to 15% for P. phosphorea. Some of the largest areas predicted as suitable for F. quadrangularis lay outside the pMPAs. The model results indicated differences in the environmental requirements of the three species of sea pen that can be linked to the autecology of each species. Patch sizes, calculated from a binary output of the model, were used to estimate the degree of habitat fragmentation, thereby giving a partial assessment of the adequacy criterion for these pMPAs. The results suggest that potential MPAs within the study area cover sizeable areas of potential sea pen habitat. However, further areas suitable for F. quadrangularis could be considered.

scholarly journals Modeling Distribution and Habitat Suitability for the Snow Leopard in Bhutan

2021 ◽  
Vol 2 ◽  
Author(s):  
Dechen Lham ◽  
Gabriele Cozzi ◽  
Stefan Sommer ◽  
Phuntsho Thinley ◽  
Namgay Wangchuk ◽  
...  
Keyword(s):  
Protected Areas ◽  
Species Distribution ◽  
Habitat Suitability ◽  
Anthropogenic Factors ◽  
Suitable Habitat ◽  
Snow Leopard ◽  
Potential Contribution ◽  
Ensemble Model ◽  
Model Framework ◽  
Biological Corridors

The snow leopard (Panthera uncia) is one of the world's most elusive felids. In Bhutan, which is one of the 12 countries where the species still persists, reliable information on its distribution and habitat suitability is lacking, thus impeding effective conservation planning for the species. To fill this knowledge gap, we created a country-wide species distribution model using “presence-only” data from 420 snow leopard occurrences (345 from a sign survey and 77 from a camera-trapping survey) and 12 environmental covariates consisting of biophysical and anthropogenic factors. We analyzed the data in an ensemble model framework which combines the outputs from several species distribution models. To assess the adequacy of Bhutan's network of protected areas and their potential contribution toward the conservation of the species, we overlaid the output of the ensemble model on the spatial layers of protected areas and biological corridors. The ensemble model identified 7,206 km2 of Bhutan as suitable for the snow leopard: 3,647 km2 as highly suitable, 2,681 km2 as moderately suitable, and 878 km2 as marginally suitable. Forty percent of the total suitable habitat consisted of protected areas and a further 8% of biological corridors. These suitable habitats were characterized by a mean livestock density of 1.3 individuals per hectare, and a mean slope of 25°; they closely match the distribution of the snow leopard's main wild prey, the bharal (Pseudois nayaur). Our study shows that Bhutan's northern protected areas are a centre for snow leopard conservation both at the national and regional scale.

scholarly journals Identification of areas of very high biodiversity value to achieve the EU Biodiversity Strategy for 2030 key commitments

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e10067
Author(s):  
Iulia V. Miu ◽  
Laurentiu Rozylowicz ◽  
Viorel D. Popescu ◽  
Paulina Anastasiu
Keyword(s):  
Protected Areas ◽  
Conservation Planning ◽  
National Level ◽  
Natura 2000 ◽  
Habitats Directive ◽  
Natura 2000 Network ◽  
Spatial Prioritization ◽  
Biogeographical Region ◽  
Very High ◽  
The Eu

Background The European Union strives to increase protected areas of the EU terrestrial surface to 30% by year 2030, of which one third should be strictly protected. Designation of the Natura 2000 network, the backbone of nature protection in the EU, was mostly an expert-opinion process with little systematic conservation planning. The designation of the Natura 2000 network in Romania followed the same non-systematic approach, resulting in a suboptimal representation of invertebrates and plants. To help identify areas with very high biodiversity without repeating past planning missteps, we present a reproducible example of spatial prioritization using Romania’s current terrestrial Natura 2000 network and coarse-scale terrestrial species occurrence. Methods We used 371 terrestrial Natura 2000 Sites of Community Importance (Natura 2000 SCI), designated to protect 164 terrestrial species listed under Annex II of Habitats Directive in Romania in our spatial prioritization analyses (marine Natura 2000 sites and species were excluded). Species occurrences in terrestrial Natura 2000 sites were aggregated at a Universal Traverse Mercator spatial resolution of 1 km2. To identify priority terrestrial Natura 2000 sites for species conservation, and to explore if the Romanian Natura 2000 network sufficiently represents species included in Annex II of Habitats Directive, we used Zonation v4, a decision support software tool for spatial conservation planning. We carried out the analyses nationwide (all Natura 2000 sites) as well as separately for each biogeographic region (i.e., Alpine, Continental, Pannonian, Steppic and Black Sea). Results The results of spatial prioritization of terrestrial Natura 2000 vary greatly by planning scenario. The performance of national-level planning of top priorities is minimal. On average, when 33% of the landscape of Natura 2000 sites is protected, only 20% of the distribution of species listed in Annex II of Habitats Directive are protected. As a consequence, the representation of species by priority terrestrial Natura 2000 sites is lessened when compared to the initial set of species. When planning by taxonomic group, the top-priority areas include only 10% of invertebrate distribution in Natura 2000. When selecting top-priority areas by biogeographical region, there are significantly fewer gap species than in the national level and by taxa scenarios; thusly, the scenario outperforms the national-level prioritization. The designation of strictly protected areas as required by the EU Biodiversity Strategy for 2030 should be followed by setting clear objectives, including a good representation of species and habitats at the biogeographical region level.

scholarly journals Habitat suitability and connectivity inform a co-managed policy of protected areas networks for Asian elephants in China

2018 ◽  
Author(s):  
Cheng Huang ◽  
Xueyou Li ◽  
Laxman Khanal ◽  
Xuelong Jiang
Keyword(s):  
Protected Areas ◽  
Habitat Suitability ◽  
Forest Cover ◽  
Habitat Requirements ◽  
Suitable Habitat ◽  
Asian Elephants ◽  
Maximum Entropy Modeling ◽  
Economic Context ◽  
Level Of Economic Development

Enlarging protected areas (PAs) network is critical to ensure the long-term viability of Asian elephants from habitat fragmentation and loss. While challenges are raised in the strictly government-managed policy of PAs networks due to the difficulties in persuading participation of stakeholders and meeting habitat requirements of the elephants. This study hypothesized that a co-managed policy is more plausible than the strict policy to enlarge PAs network for Asian elephants in a “developing” world. We identified the suitable habitat for Asian elephants using the maximum entropy modeling approach (MaxEnt) and examined the socio-economic context of the habitat. The hypothesis was supported by our results: (1) Asian elephants prefer forest matrix with multiple land use (50% forest cover) rather than interior of large forest and roam in proximity of human habitations (mean distance 1.85 km); (2) suitability and the level of economic development of the habitats are negatively correlated (p = 0.04). Additionally, we provided an empirical study on corridor designing for the study area in China.

scholarly journals Identification of areas of very high biodiversity value to achieve the EU Biodiversity Strategy for 2030 key commitments

2020 ◽  
Author(s):  
Iulia V. Miu ◽  
Laurentiu Rozylowicz ◽  
Viorel D. Popescu ◽  
Paulina Anastasiu
Keyword(s):  
Protected Areas ◽  
Conservation Planning ◽  
National Level ◽  
Natura 2000 ◽  
Habitats Directive ◽  
Natura 2000 Network ◽  
Spatial Prioritization ◽  
Biogeographical Region ◽  
Very High ◽  
The Eu

AbstractBackgroundThe European Union strives to increase protected areas of the EU terrestrial surface to 30% by year 2030, of which one third should be strictly protected. Designation of the Natura 2000 network, the backbone of nature protection in the EU, was mostly an expert-opinion process with little systematic conservation planning. The designation of the Natura 2000 network in Romania followed the same non-systematic approach, resulting in a suboptimal representation of invertebrates and plants. To help identify areas with very high biodiversity without repeating past planning missteps, we present a reproducible example of spatial prioritization using Romania’s current terrestrial Natura 2000 network and coarse-scale terrestrial species occurrence.MethodsWe used 371 terrestrial Natura 2000 Sites of Community Importance (Natura 2000 SCI), designated to protect 164 terrestrial species listed under Annex II of Habitats Directive in Romania in our spatial prioritization analyses (marine Natura 2000 sites and species were excluded). Species occurrences in terrestrial Natura 2000 sites were aggregated at a Universal Traverse Mercator spatial resolution of 1 km2. To identify priority terrestrial Natura 2000 sites for species conservation, and to explore if the Romanian Natura 2000 network sufficiently represents species included in Annex II of Habitats Directive, we used Zonation v4, a decision support software tool for spatial conservation planning. We carried out the analyses nationwide (all Natura 2000 sites) as well as separately for each biogeographic region (i.e., Alpine, Continental, Pannonian, Steppic and Black Sea).ResultsThe results of spatial prioritization of terrestrial Natura 2000 vary greatly by planning scenario. The performance of national-level planning of top priorities is minimal. On average, when 33% of the landscape of Natura 2000 sites is protected, only 20% of the distribution of species listed in Annex II of Habitats Directive are protected. As a consequence, the representation of species by priority terrestrial Natura 2000 sites is lessened when compared to the initial set of species. When planning by taxonomic group, the top-priority areas include only 10% of invertebrate distribution in Natura 2000. When selecting top-priority areas by biogeographical region, there are significantly fewer gap species than in the national level and by taxa scenarios; thusly, the scenario outperforms the national-level prioritization. The designation of strictly protected areas as required by the EU Biodiversity Strategy for 2030 should be followed by setting clear objectives, including a good representation of species and habitats at the biogeographical region level.

scholarly journals Habitat suitability and connectivity inform a co-managed policy of protected areas networks for Asian elephants in China

2018 ◽  
Author(s):  
Cheng Huang ◽  
Xueyou Li ◽  
Laxman Khanal ◽  
Xuelong Jiang
Keyword(s):  
Protected Areas ◽  
Habitat Suitability ◽  
Forest Cover ◽  
Habitat Requirements ◽  
Suitable Habitat ◽  
Asian Elephants ◽  
Maximum Entropy Modeling ◽  
Economic Context ◽  
Level Of Economic Development

Enlarging protected areas (PAs) network is critical to ensure the long-term viability of Asian elephants from habitat fragmentation and loss. While challenges are raised in the strictly government-managed policy of PAs networks due to the difficulties in persuading participation of stakeholders and meeting habitat requirements of the elephants. This study hypothesized that a co-managed policy is more plausible than the strict policy to enlarge PAs network for Asian elephants in a “developing” world. We identified the suitable habitat for Asian elephants using the maximum entropy modeling approach (MaxEnt) and examined the socio-economic context of the habitat. The hypothesis was supported by our results: (1) Asian elephants prefer forest matrix with multiple land use (50% forest cover) rather than interior of large forest and roam in proximity of human habitations (mean distance 1.85 km); (2) suitability and the level of economic development of the habitats are negatively correlated (p = 0.04). Additionally, we provided an empirical study on corridor designing for the study area in China.

scholarly journals Rhodeus Sericeus Amarus Bloch, 1782; Monitoring Elements in the New Natura 2000 Context in Croatia

2015 ◽  
Vol 16 (1) ◽  
pp. 185-204
Author(s):  
Doru Bănăduc ◽  
Angela Curtean-Bănăduc
Keyword(s):  
Protected Areas ◽  
National Level ◽  
Natura 2000 ◽  
Point Sources ◽  
Habitats Directive ◽  
General Context ◽  
The European Union ◽  
Sources Of Pollution ◽  
Community Interest ◽  
Set Up

AbstractThe action framework at the European Union level for the conservation of biodiversity was set up based on the Birds Directive (79/409/EEC) and Habitats Directive (92/43/EEC). One principal element of the implementation of these two significant Directives in Croatia is the set up of a Natura 2000 network of protected areas, a network which should be based on a specific monitoring plan at Croatian national level for each species which is considered of community interest. In this general context, this study suggests a set of monitoring elements for Rhodeus sericeus amarus for the Croatian Continental Biogeographical Region. The suggestions are based on eight selected criteria: Croatian national borders proximity sectors overlay; very good quality populations of Rhodeus sericeus amarus in terms of population density and structure (e.g. protected areas) in characteristic good habitats; habitats which need ecological reconstruction to allow this fish species populations structure ameliorate or natural repopulation; key sectors with importance for connectivity (e.g. lotic sectors between different important sectors, rivers confluence areas, etc.); sectors influenced by human impact like: industrial pollution point sources, sectors influenced by agricultural diffuse sources of pollution, sectors influenced by habitats modifications (watercourses remodeling, watercourses regulation, etc.), geographically extreme monitoring sections in the most-upstream and mostdownstream sections of the rivers, in this species range and in the near outer proximities of these extremes

Predicting bycatch hotspots based on suitable habitat derived from fishery-independent data

2020 ◽  
Vol 641 ◽  
pp. 159-175
Author(s):  
J Runnebaum ◽  
KR Tanaka ◽  
L Guan ◽  
J Cao ◽  
L O’Brien ◽  
...  
Keyword(s):  
Habitat Suitability ◽  
Mixed Model ◽  
Linear Mixed Model ◽  
Gulf Of Maine ◽  
Homarus Americanus ◽  
Management Tool ◽  
American Lobster ◽  
Suitable Habitat ◽  
Climate Conditions ◽  
Suitability Index

Bycatch remains a global problem in managing sustainable fisheries. A critical aspect of management is understanding the timing and spatial extent of bycatch. Fisheries management often relies on observed bycatch data, which are not always available due to a lack of reporting or observer coverage. Alternatively, analyzing the overlap in suitable habitat for the target and non-target species can provide a spatial management tool to understand where bycatch interactions are likely to occur. Potential bycatch hotspots based on suitable habitat were predicted for cusk Brosme brosme incidentally caught in the Gulf of Maine American lobster Homarus americanus fishery. Data from multiple fisheries-independent surveys were combined in a delta-generalized linear mixed model to generate spatially explicit density estimates for use in an independent habitat suitability index. The habitat suitability indices for American lobster and cusk were then compared to predict potential bycatch hotspot locations. Suitable habitat for American lobster has increased between 1980 and 2013 while suitable habitat for cusk decreased throughout most of the Gulf of Maine, except for Georges Basin and the Great South Channel. The proportion of overlap in suitable habitat varied interannually but decreased slightly in the spring and remained relatively stable in the fall over the time series. As Gulf of Maine temperatures continue to increase, the interactions between American lobster and cusk are predicted to decline as cusk habitat continues to constrict. This framework can contribute to fisheries managers’ understanding of changes in habitat overlap as climate conditions continue to change and alter where bycatch interactions could occur.

scholarly journals Predicting Impacts of Climate Change on Northward Range Expansion of Invasive Weeds in South Korea

Plants ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 1604
Author(s):  
Sun Hee Hong ◽  
Yong Ho Lee ◽  
Gaeun Lee ◽  
Do-Hun Lee ◽  
Pradeep Adhikari
Keyword(s):  
Climate Change ◽  
South Korea ◽  
Habitat Suitability ◽  
Management Strategies ◽  
Southern Region ◽  
Suitable Habitat ◽  
Invasive Weeds ◽  
Northern Regions ◽  
Suitable Habitats ◽  
Control And Management

Predicting the distribution of invasive weeds under climate change is important for the early identification of areas that are susceptible to invasion and for the adoption of the best preventive measures. Here, we predicted the habitat suitability of 16 invasive weeds in response to climate change and land cover changes in South Korea using a maximum entropy modeling approach. Based on the predictions of the model, climate change is likely to increase habitat suitability. Currently, the area of moderately suitable and highly suitable habitats is estimated to be 8877.46 km2, and 990.29 km2, respectively, and these areas are expected to increase up to 496.52% by 2050 and 1439.65% by 2070 under the representative concentration pathways 4.5 scenario across the country. Although habitat suitability was estimated to be highest in the southern regions (<36° latitude), the central and northern regions are also predicted to have substantial increases in suitable habitat areas. Our study revealed that climate change would exacerbate the threat of northward weed invasions by shifting the climatic barriers of invasive weeds from the southern region. Thus, it is essential to initiate control and management strategies in the southern region to prevent further invasions into new areas.

Sign in / Sign up

Export Citation Format

Share Document