Identify Biodiversity Hotspots Research Articles

Biodiversity in China's mountains

China, one of the world's “megabiodiversity countries”, is home to more than 30 000 vascular plant and 6300 vertebrate species. Over thousands of years, however, cultivation has led to the disappearance of many of these species from the plains and lowland areas. The mountain regions still harbor large numbers of species, because there have been fewer human and natural disturbances and there are more diverse habitats. We used county level species distribution databases to explore patterns of biodiversity and to identify biodiversity hotspots within China. Ten hotspot ecoregions were identified, containing 3110 plant genera (92.0% of the country's total), 220 (90.5%) endemic plant genera, 366 (94.3%) endangered plants, and 254 (72.2%) endangered vertebrates, 427 (91.0%) terrestrial mammal species, and 65 (85.5%) endemic mammals. All 10 hotspot ecoregions are located in the mountainous areas of China. Although high richness of overall, endangered, and endemic plants and animals co-occurred in many of the same hotspot ecoregions, they often occurred in different counties within these ecoregions and showed low spatial congruence. In conclusion, China's mountain regions are critical for protecting biodiversity and should be made conservation priorities in the future.

Hotspots of endemic terrestrial invertebrates in southern Greece

In the present paper we identify biodiversity hotspots of endemic terrestrial invertebrates in southern Greece, using four different criteria and five taxonomic groups. The hotspots identification procedure was facilitated by the use of the MapInfoPro G.I.S. software. We mapped the known distribution of 424 endemic species on a digital map of southern Greece in 548 10 × 10 km2 grids. The total number of registrations (records per grid) is 3826 in 465 grids. Registrations are unevenly distributed in the five sub-regions of the study area, a fact that results from both the unequal collecting effort applied in each sub-region and their different levels of endemism. We first identified the hotspots for each individual taxonomic group, and then for the total species pool. Finally, we analyzed the species saturation pattern in order to find the minimum number of grids needed for the inclusion of 85% of the total number of species. The most important hotspots are mostly at the higher mountains of the study area, especially on Taygetos and Idi Mts. We also give a brief evaluation of the performance of the four criteria used in the case of endemic species analyses.

Maryland, the Power Plant Research Program, and the Chesapeake Bay watershed

Chesapeake Bay has long been recognized as a biologically rich ecosystem, one whose wide expanse of shallow estuarine waters is unique in the world. When the biological bounty of the Bay declined dramatically, federal, state, and local governments began restoration efforts on a mammoth scale. While the successes have been many, the lesson of the last few decades has been that this great estuary cannot be restored without addressing the multitude of human activities in the watershed that cumulatively distort its ecological processes and degrade its resources. Today governments, industry, and the public are focusing on three major restoration efforts: reducing nutrient inputs, reducing toxic pollutant loads, and restoring living resources. Recognizing that power generation is an important component of the activities affecting the Bay, the Maryland Department of Natural Resources (DNR) Power Plant Research Program (PPRP) is working in partnership with electric utilities to avoid, minimize, and mitigate adverse impacts on both local and regional scales. Historically, PPRP has participated in cooperative state and industry efforts at Conowingo Dam and other upstream dams on the Susquehanna River (the Bay’s largest freshwater tributary) that have helped quantify impacts to migratory fish, resulting in modifications to dam operations and installation of fish lifts to restore populations of American shad and other anadromous fish. Other restoration projects include mitigation of acid mine drainage in the upper reaches of the watershed, installation of lime dosers in affected streams, investigation of the beneficial uses of coal combustion products for mine reclamation, and operation of a successful hatchery and release program. Currently, PPRP recognizes that its research efforts need to look up the watershed at cumulative effects on a regional scale. Recent research on the regional level undertaken by DNR includes a statewide biological stream survey to provide comprehensive baseline information on the health of freshwater systems in Maryland, and development of reference-based ecological indicators. These indicators are critical for assessing the effects of different degrading activities and measuring progress towards environmental goals. A related cumulative impact model, currently under development, will couple indicators of biological integrity with spatial data on land uses, power-related impacts, and other anthropogenic stressors to evaluate watershed impacts on aquatic systems. As part of model development, the role of vegetated riparian corridors is being evaluated to support watershed-wide initiatives to restore riparian forest buffers on Chesapeake Bay tributaries. These biological survey data and other information are being used to identify biodiversity hotspots in the State and construct maps of ecologically sensitive areas for the evaluation of cumulative effects and targeting of conservation and restoration priorities.