Lessons in Ecosystem Management from Management of Threatened and Pest Loranthaceous Mistletoes in New Zealand and Australia
Identifieur interne : 001074 ( Main/Exploration ); précédent : 001073; suivant : 001075Lessons in Ecosystem Management from Management of Threatened and Pest Loranthaceous Mistletoes in New Zealand and Australia
Auteurs : David A. Norton [Nouvelle-Zélande] ; Nick Reid [Australie]Source :
- Conservation Biology [ 0888-8892 ] ; 1997-06-09.
Abstract
Loranthaceous mistletoes are interesting because of their complex dependence on suitable host trees and avian dispersers and because of their patchy distribution at the landscape level. Although their over‐ and under‐abundance in Australia and New Zealand have been widely documented, little attention has been given to the need for an ecosystem approach to their management. Although the current status of mistletoes is very different in Australia and New Zealand, some of the causal factors and the long‐term effects of changes in mistletoe abundance are similar in the two countries. We suggest that mistletoe abundance in pre‐European landscapes was dependent on a series of evolutionary and environmental filters relating to host specificity, pollination, dispersal, infection, environmental habitat quality, predation, and disturbance. European settlement modified these filters in a number of ways, resulting in either increases or decreases in mistletoe abundance. The three broad groups of changes that have occurred with European settlement involve fragmentation, predation, and altered disturbance regimes. Although managers have usually addressed mistletoe over‐ or under‐abundance with short‐term solutions (e.g., pruning infected trees), we suggest that management must address the underlying causes of the problems involving mistletoes. This requires an ecosystem approach to management that addresses both the direct and indirect causes of the current status of mistletoes.
Url:
DOI: 10.1046/j.1523-1739.1997.95529.x
Affiliations:
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Although their over‐ and under‐abundance in Australia and New Zealand have been widely documented, little attention has been given to the need for an ecosystem approach to their management. Although the current status of mistletoes is very different in Australia and New Zealand, some of the causal factors and the long‐term effects of changes in mistletoe abundance are similar in the two countries. We suggest that mistletoe abundance in pre‐European landscapes was dependent on a series of evolutionary and environmental filters relating to host specificity, pollination, dispersal, infection, environmental habitat quality, predation, and disturbance. European settlement modified these filters in a number of ways, resulting in either increases or decreases in mistletoe abundance. The three broad groups of changes that have occurred with European settlement involve fragmentation, predation, and altered disturbance regimes. Although managers have usually addressed mistletoe over‐ or under‐abundance with short‐term solutions (e.g., pruning infected trees), we suggest that management must address the underlying causes of the problems involving mistletoes. This requires an ecosystem approach to management that addresses both the direct and indirect causes of the current status of mistletoes.</div></front></TEI><affiliations><list><country><li>Australie</li><li>Nouvelle-Zélande</li></country></list><tree><country name="Nouvelle-Zélande"><noRegion><name sortKey="Norton, David A" sort="Norton, David A" uniqKey="Norton D" first="David A." last="Norton">David A. Norton</name></noRegion></country><country name="Australie"><noRegion><name sortKey="Reid, Nick" sort="Reid, Nick" uniqKey="Reid N" first="Nick" last="Reid">Nick Reid</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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