Rutger's English Blogg

Increasing biodiversity in our mountains 2013-04-04

Publicerad 2013-04-05 10:56:22 i Allmänt
"The local species richness has increased throughout the country. The clearest trend is in the mountains and inland areas of Norrland as many southern species expanded their ranges northward. But it is also noticeable in the south where many species that previously had little or incoherent propagation now filled out the poorer areas, says Åke Lindström, zooekolog at the university. "
"The big winners are generalists, that is, species that thrive in many different natural environments. These include wrens, cranes, nuthatch, cuckoo, Mistle Thrush, Blackbird, Fieldfare, garden warbler and great spotted woodpecker.
- The cuckoo increase is interesting, given that the former was in sharp decline. Now the trend has reversed in the other direction, says Lindstrom. "
"Though completely regimented it is not yet. Happily, all northern species is still  there, despite the increase in temperature., It seems as though most still holds its own." Although some decreases as bluethroat, willow sparrow and maybe patch tit.

The same positive messages is coming from botanically knowledgeable inventory in the mountains. See what Leif Kullman writes:


"Plant "mountain hiking" means that the species richness of some high mountain peaks increased by 60-170% over the last 50-60 years, This without a single native species disappeared. Changes to cut through the ecosystem, all levels implied by the standard yellow chanterelles found high up in the mountains (c. 1400 m above sea level), far higher than previously known.
Even around the new and higher timberline flora has added more and more pronounced heat-demanding species, most of which are not normally associated with mountains. Occasional seedlings of oak and elm trees now growing quite near birch tree limit in Jämtland and Härjedalen. Although alder, maple and birch have begun to appear in the upper forest belt. There are at least 8000 years ago "deciduous trees" growing on the corresponding levels in the mountain regions.
The enclosure of the new small birch groves established in the mountains are several representatives of a newly arrived southern forrest flora.Anemone, golden saxifrage milkwort and bracken are some examples. "
"All of the progressive changes of the mountain vegetation described here has occurred despite reideer feading increased significantly over the last 50 years."
"The general impression is that the mountains become greener and plant cover everything lusher and more high grown. Alpine plants flowering has intensified, which attracts several large butterflies, previously rarely seen flying high up in the mountains. Possibly, the growth dynamic in the mountains stimulated not only by higher temperatures . Atmospheric increased levels of carbon dioxide cause in principle a "fertilization effect," which could explain some extreme growth phenomenon. "
Warmer climate entails increased biodiversity, maybe not so strange.





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