The worth of various tree species for bugs and lichens


The worth of various tree species for bugs and lichens

 

The Worth of Completely different Tree Species for Invertebrates and Lichens

The desk beneath exhibits the variety of bugs and epiphytic (rising on crops) lichens
which have been recorded in affiliation with frequent timber and shrubs in Britain. The figures in brackets embrace mite species in addition to bugs.

 

* Launched Species

Necessary Notes:

The desk above is a great tool, though it doesn’t start to supply the complete image of the worth of various tree species for wildlife. It ought to under no circumstances be assumed that as a result of the desk exhibits comparatively few animal/lichen species related with a specific tree species, that this species is due to this fact of little worth for wildlife.

The desk needs to be learn with the next cautionary factors in thoughts:

  • Nobody particular person tree of a specific species will harbour all of the species of bugs/mites/lichens identified to be related to that tree species. Certainly, no single woodland is prone to comprise all the species related to its constituent tree species.
  • Timber of the identical species in several geographical areas of Britain can have totally different units of related fauna and lichens. Climatic and geographical variations, in addition to the mobility of the related species involved will all affect which insect/mite/lichen species can colonize particular person timber and survive in a specific space.
  • Species variety shouldn’t be the identical as biomass. A tree species might have comparatively few insect species related to it, but when the bugs that are related to it happen in enormous numbers (e.g. aphids) then that tree might harbour an enormously vital supply of meals for different animals. A tree’s worth for wildlife doesn’t due to this fact essentially equate to the variety of species instantly related to it.
  • A lot of the desk above is derived from a paper by Southwood (1961). The information from this immensely helpful paper is predicated upon tree foliage eaters. Nonetheless, timber clearly present a variety of assets for species apart from these merely consuming their foliage. Southwood additionally focused on species particularly linked to specific tree species and intentionally omitted these species feeding on a variety of host tree species
  • (This level is said to the above.) The worth of particular person timber for wildlife relies upon upon the age of the tree. Completely different species could also be related to an particular person tree at totally different phases of its lifecycle. For instance, bugs related to flowers and fruits, will solely have the ability to profit from a specific tree as soon as it has grown sufficiently and is mature sufficient to flower. Older timber even have a a lot higher selection of microhabitats out there for colonization.
    (Extra here.)
  •  
The desk above itemizing the worth of timber for bugs and lichens is derived from a wide range of sources together with the Forestry Fee and BTCV.

The unique supply references for the variety of species are:

Bugs

Southwood, T.R.E. (1961) The numbers of species of insect related with varied timber. J. Animal Ecology 30: 1-8

Lichens

Rose F. and Harding, P.T. (1978)  Pasture and woodlands in Lowland Britain and their significance for the conservation of the epiphytes and invertebrates related to outdated timber.  Nature Conservancy Council & The Institute of Terrestrial Ecology.

Additional Notes

Southwood’s authentic paper was up to date by:

Kennedy, C.E.J. and Southwood, T.R.E. (1984) The variety of species of bugs related to British timber: a re-analysis. J. Animal Ecology 53: 455 -478

The topic has additionally just lately been revisited by:
Alexander, A., Butler, J. and Inexperienced, T. (2006) British Wildlife 18(1): 18 – 28.

That is a particularly helpful paper which supplies a broad view of the worth of timber for wildlife. It takes into consideration a variety of different species related to timber together with mycorrhizal communities; soil organisms; lifeless wooden decay communities; epiphytes; in addition to flower and fruit feeders. It needs to be a ‘should learn’ for anybody all in favour of or working with the subject.

 

 

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