Habitat destruction

There is great variation in the conservation status of the last habitats with long-term natural viable populations of the salmon species Hucho hucho in Maramureş Mountains Nature Park, Eastern Carpathians (Romania). According to the specific guidelines for Natura 2000, 42.11% are in good conservation status, 31.57% are of average status, and 26.32% are in a partially degraded condition.

9p dolomite36 30-12-2021 9 0   Download

Freshwater ecosystems have a greater value for biodiversity per surface area than terrestrial and marine ecosystems. Streams and lakes are notably prone to biodiversity loss, being the greatest threats habitat destructions and nonnative species. The aim of the present study is to assess the fish composition of lotic and lentic water systems of an island ecosystem (Gökçeada Island, Turkey), which is poorly studied, and to highlight the entry routes and possible impacts of translocated fish species in an island ecosystem.

9p dolomite36 30-12-2021 9 0   Download

Paphiopedilum is an important genus of the orchid family Orchidaceae and has high horticultural value. The wild populations are under threat of extinction because of overcollection and habitat destruction.

15p vijeeni2711 30-06-2021 12 1   Download

V. jatamansi Jones is an important medicinal wild herb of North Eastern Himalayan Region belonging to family Valerianaceae. The herb is widely used in treatment of leprosy, epilepsy, hysteria and asthma and also in making perfumed powder. Due to overexploitation of roots and rhizomes, V. jatamansi is included in endangered species as per National Medicinal Plant Board, New Delhi, India. The harvest of roots and rhizomes causes destruction of whole plant at its natural habitat.

7p kequaidan4 21-04-2020 11 0   Download

A number of old and new pathogen has emerged or re-emerged in past 30 years. Increase in interaction at the interface of human and animals plays a crucial role in transmission of these zoonotic agents at the interface. Burgeoning human population, increased global communication, habitat destruction, bush meat consumption, intensification of animal farming. Along with emergence of antimicrobial resistance and increased incidence food borne infections are important public health implications in which human-animal interface plays a definite role.

12p quenchua4 06-04-2020 17 1   Download

Dipterocarpus dyeri (Dipterocarpaceae) is widely distributed in lowland rainforests in southeastern Vietnam. Due to over-exploitation and habitat destruction in the 1980s and 1990s, this species is listed as threatened. Understanding the genetic variation and mating rate among D. dyeri population that occurs in forest patches is necessary to establish effectively conservation strategies for this species. To conserve the species in tropical forests, genetic diversity and mating rate were investigated using eight microsatellites (single sequence repeat, SSR) as markers.

7p gaunguyen6789 22-10-2019 9 0   Download

Chapter 38 - Conservation biology. This chapter presents the following content: Biodiversity is a vital resource that is being lost; biodiversity includes genetic, species, and ecosystem diversity; habitat destruction, invasive species, and overexploitation are major threats to biodiversity;...

66p shiwo_ding2 03-04-2019 19 1   Download

(BQ) Tài liệu Frogs and Toads includes frog world, you are the explorer, a guide to frogs and toads, try this! Projects you can do. The book also explores frogs interaction with humans, from scientific research and the trade in exotic pets, to how their survival is threatened by habitat destruction, climate change and disease.

33p thieulam5782 04-10-2015 54 12   Download

Theimpactonthenaturalhabitatisofgreatconcernatpresent.Increasingdemandcouldforce thedestructionofnaturalhabitats,breedinggrounds,removalofwintercover,shelterbedsfor somespecies.Mechanizationofagriculturesawthedestructionofnests,burrows,etc.Similar impactbutwithgreaterintensitycanbeexpectedtoresultfromenergycropplantations. Extendingenergycropfarmingintounusable,non
agriculturallandcanhaveanegativeimpact on that particular eco system.

33p loixinloi 08-05-2013 80 6   Download

Nowadays, environmental issues including air and water pollution, climate change, overexploitation of marine ecosystems, exhaustion of fossil resources, conservation of biodiversity are receiving major attention from the public, stakeholders and scholars from the local to the planetary scales. It is now clearly recognized that human activities yield major ecological and environ- mental stresses with irreversible loss of species, destruction of habitat or cli- mate catastrophes as the most dramatic examples of their effects.

270p huetay_1 28-02-2013 77 9   Download

Mining wastes can cause significant ecological destruction. Often, solid mine wastes are dumped into streams, destroying habitat and causing siltation and heavy metal and other contamination. Even when such wastes are stored out of water channels, trace materials can leach into surface waters and infiltrate into local groundwater. Fine- grained tailings can wash into local waterways and degrade streams by covering and filling coarser-grained substrates.

41p saimatkhauroi 01-02-2013 58 4   Download

To understand how species became extinct millions of years ago, biologists can get clues from extinctions that have taken place over the past few centuries. When Dutch explorers arrived on Mauritius in the 1600s, for example, they killed dodos for food or sport. They also inadvertently introduced the first rats to Mau- ritius, which then proceeded to eat the eggs of the dodos. As adult and young dodos alike were killed, the population shrank until only a single dodo was left. When it died, the species was gone forever.

74p machuavo 19-01-2013 40 3   Download

Importance of Coral Reefs: 0.2% of world’s ocean. Habitat for 1/3 of marine fishes. Habitat for tens of thousands of other animals. The rainforests of the oceans. Destruction of other ecosystems upon which coral reefs depend. Possible disruption of reproduction and recruitment.

39p lehanhspk 17-03-2011 173 43   Download

The Arabian leopard, Panthera pardus nimr, is critically endangered around the world and particularly in the Arabian peninsula, where it was once found throughout the coastal mountain ranges. Activities like hunting, trapping and habitat destruction has reduced their range to a few isolated and fragmented populations in Oman, Yemen and Saudi Arabia.

363p cuongdbf123 24-04-2010 414 235   Download