Multi-scale assessments highlight silvicultural opportunities to increase species diversity and spatial variability in forests
| Autor: | Klaus J. Puettmann, John C. Tappeiner |
|---|---|
| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Forestry. 87:1-10 |
| ISSN: | 1464-3626 0015-752X |
| Popis: | Foresters influence short- and long-term development of plant neighbourhoods, stands and landscapes by their managementpractices.Inthepast,mostofthesepracticeshaveaimedtohomogenizethecompositionandstructure of stands forefficient wood production.This publication provides an overview of and guidance onhowto recognize and efficiently utilize opportunities to modify silvicultural practices, with the goal of increasing species diversityandspatialvariabilitywithinstandsandlandscapesatminimumcost.Wesuggestaprocedureforselectingcandidatetreatmentsthatmightbeusedinthisway.Wefurthersuggestthatmulti-scaleevaluations(e.g.differentobjectives,suchaseconomicvsecologicalgoals;differenttimeframesfromshort-termtorotationlengths; and longer, different spatial scales from plant neighbourhoods to landscapes) can highlight opportunities to increasespeciesdiversityandspatialvariabilityduringimplementationsof‘standard’forestmanagementpractices. For example, opportunities may derive from situations where management practices did not achieve their intended goals or where natural disturbances can be viewed as stimuli that initiate opportunities to increase heterogeneity. With modifications, silvicultural responses to such conditions can provide efficient, low-cost (or even cost saving) means to increase species diversity and spatial variability. Using replanting, treatment of ‘minority’ species,variablespacingguidelines,andotherexamples,weshowhowvaryingthespatialandtimescalesofevaluationsforsuchmodifiedtreatmentscaninfluenceconclusionsaboutcostsandecologicalimpacts.Consequently, the choice of evaluation scales can be a deciding factor in whether treatment modifications are considered as economically justifiable ways to achieve a suite of diverse objectives. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|