An important paper -
Stagoll, K., D. B. Lindenmayer, E. Knight, J. Fischer and A. D.
Manning (2012). “Large trees are keystone structures in urban
parks.” Conservation Letters 5(1).Article first
published online: 2 FEB 2012 DOI: 10.1111/j.1755-263X.2011.00216.x
Abstract: Large trees are considered keystone structures in
agricultural and forestry production landscapes, but research
demonstrating this in urban landscapes is urgently needed. If large
trees are keystone structures in urban parks, it is imperative that
this is recognized in policy to ensure their ongoing existence. We
studied the role of large native trees for birds in urban parks in
Canberra, Australia. We found that (1) large trees had a
consistent, strong, and positive relationship with five measures of
bird diversity, and (2) as trees became larger in size, their
positive effect on bird diversity increased. Large urban trees are
therefore keystone structures that provide crucial habitat resources
for wildlife. Hence, it is vital that they are managed
appropriately. With evidence-based tree preservation policies that
recognize biodiversity values, and proactive planning for future
large trees, the protection and perpetuation of these important
keystone structures can be achieved.
Robin Hide
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