Extinction risk of wood-living model species in forest landscapes as related to forest history and conservation strategy

Ranius, Thomas; Kindvall, Oskar

doi:10.1007/s10980-005-5222-3

Cited by 40 publications

(25 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The colonisation ability affects which strategy that is the most efficient for preservation of this fauna. If the colonisation ability is low it is important that the conservation efforts are conducted close to sites where the target species are present (Huxel and Hastings 1999), while to protect species that colonise over long distances there should be more focus on sites where restoration efforts are inexpensive and may generate a quick increase in habitat quality (Ranius and Kindvall 2006). A low capacity to establish new populations far from present ones should especially be expected for species in habitats with low temporal and high spatial variability in carrying capacity, because they are assumed to have low dispersal rates (Southwood 1962;Johnson and Gaines 1990;Nilsson and Baranowski 1997;Travis and Dytham 1999).…”

Section: Introductionmentioning

confidence: 99%

Restricted dispersal in a flying beetle assessed by telemetry

et al. 2007

Self Cite

View full text Add to dashboard Cite

Many insects living in ancient trees are assumed to be threatened as a result of habitat loss and fragmentation. It is generally expected that species in habitats with low temporal variability in carrying capacity have lower degree of dispersal in comparison to those in more ephemeral habitats. As hollow trees are long-lived, species in that habitat are expected to be sensitive to habitat fragmentation, due to a low capacity to establish new populations far from present ones.Using radio telemetry, we studied the dispersal for a beetle, Osmoderma eremita, living in hollow trees. O. eremita exhibited philopatry and only dispersed over short ranges. 82-88 % of the adults remained in the tree where they were caught. All observed dispersal movements ended up in nearby hollow trees and 62 % in the neighbouring hollow tree. These results corroborate the suggestion that habitat fragmentation may be detrimental to insects living in temporally stable but spatially variable habitats. In order to preserve such species, we propose that conservation efforts should be focused on maintaining or increasing the number of suitable trees in and near presently occupied stands.

show abstract

Section: Introductionmentioning

confidence: 99%

Restricted dispersal in a flying beetle assessed by telemetry

et al. 2007

Self Cite

View full text Add to dashboard Cite

show abstract

“…For conservation of species with a high capacity for colonisation of habitat patches far away other criteria should be used for cost-efficient conservation efforts. For instance, localities where it is possible to improve the habitat quality most quickly could be selected (Ranius and Kindvall 2006). …”

mentioning

confidence: 99%

Measuring the dispersal of saproxylic insects: a key characteristic for their conservation

2006

Self Cite

View full text Add to dashboard Cite

2Abstr act. In nature conservation it is important to understand under which circumstances populations can survive by compensating local extinctions with colonisations. Many saproxylic (= wood-dwelling) insect species have declining populations and are regarded as threatened due to low habitat availability in managed forests. Several methods have been used to better understand the dispersal biology and colonisation ability of saproxylic insects with declining populations. In this paper, I summarize and compare the results of such studies.When the same species have been studied using several methods, the results are consistent, but different aspects of dispersal biology are revealed with different methods. Capturerecapture and telemetry are direct methods that can be used to quantify dispersal rate and range in the field. Studies of genetic structure and occupancy patterns are complementary, as they reveal the consequences of dispersals that have taken place over a larger spatial and temporal scale than is possible to study with direct methods. Because colonisation, rather than dispersal, is most important for population persistence, colonisation experiments provide useful information. To obtain information relevant for conservation work dispersal studies should be conducted on model species that are representative of threatened species.Colonisation ability probability differs between common and rare species, and therefore it is important to also study dispersal of rare species, even if it is more difficult.Key terms: capture-recapture, colonisation, dead wood, Osmoderma eremita, telemetry, tethered flight 3 Intr oductionIn order to understand population dynamics and assess extinction risks, knowledge about species' dispersal rate and range are important. Dispersal is necessary for gene flow (e.g. Slatkin 1987), colonisation of empty habitat (e.g. Hanski et al. 1994), and may also affect the population dynamics (Pulliam 1988) and extinction risks of local populations (Brown and Kodrick-Brown 1977). Therefore, dispersal affects how the populations are able to cope with changes in the environment, such us habitat loss and fragmentation (Thomas 2000). Models that do not explicitly involve costs for dispersal (such as Levins ' (1969, 1970) metapopulation model) suggest that dispersal is always beneficial. If the dispersal rate is high, however, an increased local extinction risk may make species with high dispersal rates more vulnerable in fragmented landscapes (Hanski and Zhang 1993). Empirical data support the view that there is no simple positive relationship between dispersal and population persistence in fragmented landscapes; Thomas (2000) related the recent decline of British butterfly species with their proneness for dispersal and found that species in the intermediate category had experienced the most serious declines, while both more mobile and more sedentary species had persisted better. This pattern is dependent on the degree of fragmentation; at a later stage in the fragmentation process, we should expec...

show abstract

“…Concerning the area effect, Lindenmayer et al (2015) performed the first experimental evaluation of the SLOSS (single large or several small areas for conservation) debate to VRH systems, and their results showed no significant area effect on bird species richness: thus IdS area could be adapted to local socio-economic requirements without compromising their value. Moreover, considering the extinction risk of saproxylic species, Ranius & Kindvall (2006) suggested that small reserves in landscapes characterized by commercial forestry have the advantage of containing higher quality fragments, which do not suffer the time-lag in deadwood restoration, as much as larger and younger areas.…”

Section: Landscape Approachmentioning

confidence: 99%

The forest biodiversity artery: towards forest management for saproxylic conservation

Mason¹,

Zapponi²

2016

iForest

View full text Add to dashboard Cite

One of the objectives of forest conservation is the set aside of unharvested areas. However, the fragmentation and lack of connectivity of protected areas make the integration of conservation measures in productive forests essential. Strategies to integrate conservation of saproxylic biodiversity in forest management have been developed, but often considering only specific aspects or remaining preliminary otherwise. As the impact of climate change and anthropogenic stresses increases, the development and the synthesis of this approach is crucial. We reviewed the key literature on forest management for biodiversity conservation, integrating forest science perspective to provide a practical management framework. Our goal is to present a management framework that could contribute to the effective preservation of forest insect biodiversity at the landscape scale, without high economic efforts, and addressing the conflicts that still jeopardize sustainable forest management. The results of our review support the creation of micro-reserves inside productive forests, to support large reserves in landscape conservation strategies. Micro-reserves increase the resilience of forest ecosystems to anthropogenic disturbances, through the development of a heterogeneous structure, maximizing microhabitat availability. Modeling forest management and harvest on local natural disturbance would extend the benefits of spatio-temporal heterogeneity in productive forests. Variable retention harvest systems, applied at the landscape scale, are a feasible and adaptable strategy to preserve and increase biodiversity, safeguarding structural legacies such as senescent trees and deadwood inside the productive matrix. The operational shift, from the stand to the forest landscape, is fundamental to extend the benefits of conservation measures. The Forest Biodiversity Artery, composed by several micro-reserves or îlots de senescence, connected by corridors of habitat trees and deadwood, constitutes a network that would deliver old-growth forests attributes to the productive matrix. This planning instrument would support forest connectivity, and socioeconomic constraints.

show abstract

Extinction risk of wood-living model species in forest landscapes as related to forest history and conservation strategy

Cited by 40 publications

References 31 publications

Restricted dispersal in a flying beetle assessed by telemetry

Restricted dispersal in a flying beetle assessed by telemetry

Measuring the dispersal of saproxylic insects: a key characteristic for their conservation

The forest biodiversity artery: towards forest management for saproxylic conservation

Contact Info

Product

Resources

About