Ernstig bedreigde diersoorten


Bamboo lemur, only 130 left These mammals are among the rarest, and most endangered, creatures on earth. Vier van de zes soorten mensapen staan in de categorie ernstig bedreigd van de rode lijst van bedreigde diersoorten van iucn. Dat zijn de twee soorten gorilla en de twee soorten orang-oetan. De bonobo en de chimpansee staan daar ook, in de categorie bedreigd. 35 diersoorten die met uitsterven bedreigd worden door het toedoen van de mens zijn er door de jaren heen heel wat diersoorten van de aardbodem verdwenen. Momenteel zijn er ook een groot aantal soorten die moeten vrezen voor hun voortbestaan. Bedreigde diersoorten, dieren in het wild zijn een inspiratiebron voor ons, maar ze zijn ook onontbeerlijk om de natuur en ons welzijn in evenwicht te houden.

onderstaande dieren gaat het zo slecht dat, als er geen wonder gebeurt, de kans groot is dat ze binnen. In beeld: 30 ernstig bedreigde diersoorten 20/06/13 om 16:01 - bijgewerkt om 16:01 deze dertig diersoorten zijn met uitsterven bedreigd volgens de Internationale Unie voor Natuurbescherming (iucn). De iucn rode lijst van bedreigde soorten is de meest. Achteruitgang wilde voedselgewassen brengt voedselzekerheid en diersoorten. Bekijk deze pin en meer op bedreigde diersoorten van rbak97. Find this Pin and more on bedreigde diersoorten by rbak97. We should aware about the extinct species or list of extinct animals. Here we publish Top 5 most rare animals in the world among most endangered species.

Maar ook in Europa (Brussel en Parijs) vind je soms mensapen op de menu's. martin Harvey / wwf, een Borneose orang-oetan speelt met twijgjes in Sabah op Maleisisch Borneo. Huisdier, babychimpansees en -orang-oetans worden gevangen en verkocht als huisdier. Hun moeder wordt daarbij gezond vrijwel altijd gedood. Sommige mensapen belanden in stropersklemmen die bedoeld zijn voor ander wild. Ziekten, vrijwel alle mensapen hebben te kampen met menselijke ziekten, burgeroorlogen en jacht door armoede onder de bevolking. Bescherming van de mensapen.

Bedreigde diersoorten - wnf


Vier van de zes soorten mensapen staan in de categorie "Ernstig bedreigd" van. Rode lijst van bedreigde diersoorten van iucn. Dat zijn de twee soorten gorilla en de twee soorten orang-oetan. De bonobo en de chimpansee staan daar ook, in de categorie "Bedreigd". Alle mensapen lopen het gevaar uit te sterven, de eerste vier nog veel meer dan de laatste twee. Bushmeat en houtkap, er blijft steeds minder bos over voor de mensapen door houtkap, aanleg van oliepalmplantages en bosbranden. De bloeiende handel in Afrikaans apenvlees ( bushmeat ) zorgt er bovendien voor dat ze in vrijwel alle landen een goedkope geliefd jachtobject zijn. Gerookte of gestoofde gorilla en chimpansee zijn delicatessen in Afrika.

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Population losses due to hunting may be partially offset by population growth, which has a maximum theoretical rate of 2 annually (Marshall et al, 2009). The only study to have measured growth in a bornean Orangutan population was carried out in Sebangau national Park in a population recovering from a logging-induced crash. Here, growth was relatively uninhibited and estimated to increase at an average annual rate.2013 (Husson. It is highly unlikely that a continuously-hunted population could recover at this rate, but in order to take into account uncertainties in determining the level of hunting,.5 growth rate is applied, resulting in a net population decrease due to hunting.1 annually. This equates to an additional loss (once habitat clearance and impacts of logging are factored in) of population by 2010 and population by 2025. Overall, poaching contributes 12 to the estimated population decrease. The combined impacts of habitat loss, habitat degradation and illegal hunting equate to an 86 population reduction between 19 which qualifies the species for listing as Critically Endangered. This estimate is relatively conservative, as it does not include additional future population losses anticipated due to stochastic effects that will reduce populations inhabiting increasingly small forest fragments. Orangutan habitat loss and killing were already significant threats during the period 19501973, and the species was already declining at this time.

Thus we conservatively estimate the ongoing rate of loss in voor this administrative type of forest to.5 per year. This will represent another 19,821 km of forest lost between 20:.2 of the orangutan habitat in 2010,.7 in 1973. Habitat degradation and jodiumtabletten orangutan decline. In addition to habitat loss, selective logging has degraded 56 of Bornean Orangutan habitat since 1973 (gaveau. The impacts of logging on orangutan density are variable, from little change in lightly-logged forest to major negative impacts in heavily-logged forest (Ancrenaz. For example, selective artisanal logging reduced orangutan densities in peat-swamp forests by 2130 (Husson.

2009 while mechanised logging in dryland forests is presumed to have a greater impact. Thus, 56 of the Bornean Orangutan range could undergo a 20 decrease in carrying capacity. This estimate is conservative, considering that in Kalimantan the total area of natural forest allocated for timber extraction is increasing. Reduction in carrying capacity due to logging would then equate to a loss of population by 2010, and overall accounts for 4 of the total projected population decline. Hunting and orangutan decline, the widespread impacts of illegal hunting had not been quantified prior to a major questionnaire study throughout Kalimantan in (Meijaard. The authors estimated that 6301,357 Bornean Orangutans were killed in 2008 and that an average of 2,3833,882 per year had been killed during the lifetimes of the survey respondents. The mean estimate (2,256 orangutans poached in Kalimantan each year) equates.

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2014 representing a net loss of 98,730 km of prime orangutan habitat. It is estimated that a further 37 of suitable orangutan habitat (155,106 km) will be converted to plantations between 20, which accounts for the goedkope loss of an additional 57,140 km of orangutan habitat (Wich. Compared to the baseline (253,153 km more than 155,867 km or.5 of orangutan habitat will be gone by 2025; see table 1 in Supplementary material. The orangutan habitat remaining in 2010 (97,716 km) was either protected or designated for timber production (Wich. Nonetheless, forest loss is expected to occur here too, owing to fires, encroachment and smallholder plantation development. Rates of forest loss measured at two sites with the largest Borneo orangutan populations are:.9 per year (19912000) and.5 per year (20002007) at Sebangau national Park (Husson. 2015 and.4 per year including the buffer zone,.1 excluding the buffer zone (19882002) at Gunung Palung National Park (Curran. The rate of loss in production forests outside formally protected areas will undoubtedly be higher (Santika.

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Considering that in 1973,.7 of Borneo (424,753 km) was under natural forest (gaveau. 2014 we estimate that 253,153 km of forest was orangutan habitat at this time. Mechanized logging in Borneo started in the eenpersoonsgerechten early 1950s, and industrial logging and forest conversion intensified in the late 1960s. The rate of forest conversion is difficult to estimate prior to 1973 due to the lack of satellite imagery, but a recent spatial analysis evaluated forest persistence, clearance and logging spanning the 37 years between 19 (gaveau. We take the rate of forest loss documented from 1973 to 2010 as conservative and de facto lower than if data were available from 1950. Habitat loss and orangutan decline. During the period 19732010, 39 of Bornean forests were lost (gaveau.

2009 this decline will occur in a period of buikvet three generations. Pongo pygmaeus subspecies is roughly equally affected. Only one comprehensive quantitative survey of Bornean Orangutans has been conducted, in 2010, which prohibits quantitative assessment of changes in numbers for most populations. Temporal changes in population status are therefore best assessed via the proxies of habitat loss and hunting rates. A detailed rationale for a population decline of more than 2025 follows. The most accurate estimate of the geographic range of Bornean Orangutans showed that in 2010,.6 of the forest remaining in Borneo was suitable habitat (155,106 km of 260,109 km of forest: Wich. 2012, gaveau.

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Justification: Bornean Orangutans are lowland forest specialists, rarely found above 500 m asl. In the 1950s, the habitat suitable for orangutans extended across 255,000 km of the island of Borneo (see below). The two major reasons why most Bornean Orangutans populations are in sharp decline are (1) destruction, degradation and rijst fragmentation of their habitats, and (2) hunting. Recurrent forest fires, especially in peat forests, cause additional sharp declines about once every decade. Bornean Orangutans decreased by more than 2010, and a further 22 decline is projected to occur between 20 (see below). Combined, this equates to a loss of more than 82 over 2025. Given that a bornean Orangutan's generation length is 25 years (Wich.

Ernstig bedreigde diersoorten
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