Dataset Information

Effects of Management on Lichen Species Richness, Ecological Traits and Community Structure in the Rodnei Mountains National Park (Romania).

ABSTRACT: Lichens are valuable bio-indicators for evaluating the consequences of human activities that are increasingly changing the earth's ecosystems. Since a major objective of national parks is the preservation of biodiversity, our aim is to analyse how natural resource management, the availability of lichen substrates and environmental parameters influence lichen diversity in Rodnei Mountains National Park situated in the Eastern Carpathians. Three main types of managed vegetation were investigated: the transhumance systems in alpine meadows, timber exploitation in mixed and pure spruce forests, and the corresponding conserved sites. The data were sampled following a replicated design. For the analysis, we considered not only all lichen species, but also species groups from different substrates such as soil, trees and deadwood. The lichen diversity was described according to species richness, red-list status and substrate-specialist species richness. The variation in species composition was related to the environmental variables. Habitat management was found to negatively influence species richness and alter the lichen community composition, particularly for threatened and substrate-specialist species. It reduced the mean level of threatened species richness by 59%, when all lichen species were considered, and by 81%, when only epiphytic lichens were considered. Management-induced disturbance significantly decreased lichen species richness in forest landscapes with long stand continuity. The diversity patterns of the lichens indicate a loss of species richness and change in species composition in areas where natural resources are still exploited inside the borders of the national park. It is thus imperative for protected areas, in particular old-growth forests and alpine meadows, to receive more protection than they have received in the past to ensure populations of the characteristic species remain viable in the future.

SUBMITTER: Ardelean IV

PROVIDER: S-EPMC4696781 | biostudies-literature | 2015

REPOSITORIES: biostudies-literature

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Effects of Management on Lichen Species Richness, Ecological Traits and Community Structure in the Rodnei Mountains National Park (Romania).

Ardelean Ioana Violeta IV Keller Christine C Scheidegger Christoph C

PloS one 20151230 12

Lichens are valuable bio-indicators for evaluating the consequences of human activities that are increasingly changing the earth's ecosystems. Since a major objective of national parks is the preservation of biodiversity, our aim is to analyse how natural resource management, the availability of lichen substrates and environmental parameters influence lichen diversity in Rodnei Mountains National Park situated in the Eastern Carpathians. Three main types of managed vegetation were investigated: ...[more]

PMID: 26717517

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Project description:Understanding the ecological factors that drive animal density patterns in time and space is key to devising effective conservation strategies. In Tanzania, most chimpanzees (~75%) live outside national parks where human activities threaten their habitat's integrity and connectivity. Mahale Mountains National Park (MMNP), therefore, is a critical area for chimpanzees (Pan troglodytes schweinfurthii) in the region due to its location and protective status. Yet, despite its importance and long history of chimpanzee research (>50 years), a park-wide census of the species has never been conducted. The park is categorized as a savanna-woodland mosaic, interspersed with riparian forest, wooded grassland, and bamboo thicket. This heterogeneous landscape offers an excellent opportunity to assess the ecological characteristics associated with chimpanzee density, a topic still disputed, which could improve conservation plans that protect crucial chimpanzee habitat outside the park. We examined the influence of fine-scale vegetative characteristics and topographical features on chimpanzee nest density, modeling nest counts using hierarchical distance sampling. We counted 335 nests in forest and woodland habitats across 102 transects in 13 survey sites. Nests were disproportionately found more in or near evergreen forests, on steep slopes, and in feeding tree species. We calculated chimpanzee density in MMNP to be 0.23 ind/km2, although density varied substantially among sites (0.09-3.43 ind/km2). Density was associated with factors related to the availability of food and nesting trees, with topographic heterogeneity and the total basal area of feeding tree species identified as significant positive predictors. Species-rich habitats and floristic diversity likely play a principal role in shaping chimpanzee density within a predominately open landscape with low food abundance. Our results provide valuable baseline data for future monitoring efforts in MMNP and enhance our understanding of this endangered species' density and distribution across Tanzania.

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Project description:BackgroundSharing of space by humans and wildlife at a time may ignite apparent conflict. Populations of many species are declining due to the degradation of wildlife habitats caused by agricultural activities. Additionally, livestock may compete with wild herbivores for grazing and reduce the abundance of wild prey for carnivores. A reduction in populations of prey species of large predators might cause carnivores to be attracted towards livestock, ultimately provoking and aggravating the human-carnivores conflict. This study investigated the current status of the human-predators conflict in and around the Bale Mountains National Park.ResultsMost (72.75%) respondents agreed on the presence of livestock predation. Major reported predators were spotted hyena (Crocuta crocuta), olive baboon (Papio anubis), African wolf (Canis lupaster), aardvark (Orycteropus afer), genet (Genetta genetta), Ethiopian wolf (Canis simensis), lion (Panthera leo), and leopard (Panthera pardus). Cattle (54.19%), sheep (70.96%), goat (32.0%), donkey (37.72%) and horse (27.54%) were mentioned as major target of predators. Within the past ten years 1623 sheep, 741 cattle, 639 goats, 193 donkeys, and 124 horses were predated. This study found an increasing trend of livestock predation. The trend was reported to be high within the Park (68%). During the past ten years, households reported killings of 3320 livestock that cost 347,460.53 USD. Loss of 8.66 USD per month constituted 27.45% of their monthly income which is expected to have a great sustenance impact. Human settlement (41%), agricultural practices (38.6%), overgrazing (25.3%), deforestation for charcoal production (25.1%), deliberate fire to free lands for agriculture (17.3%) were noticed as major causes of livestock depredation.ConclusionsThe results of the present study show that there is strong human-livestock predator conflict in the study area. Therefore, the author suggested that conflict mitigation efforts focus on securing the livestock enclosure to protected areas and regular compensation fees for farmers that face great damage from wildlife. The foremost action should be awareness creation about the environmental, social, and economic importance of protected areas. The management staff of the Park is also expected to promote community involvement in the plan of mitigation strategies and practices.

Dataset Information

Effects of Management on Lichen Species Richness, Ecological Traits and Community Structure in the Rodnei Mountains National Park (Romania).

Publications

Effects of Management on Lichen Species Richness, Ecological Traits and Community Structure in the Rodnei Mountains National Park (Romania).

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