Trees outside forests in agricultural landscapes: spatial distribution and impact on habitat connectivity for forest organisms

Rossi, Jean‐Pierre; García, Jacques; Roques, Alain; Rousselet, Jérôme

doi:10.1007/s10980-015-0239-8

Cited by 46 publications

(35 citation statements)

References 48 publications

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“…It appears that the SP spread faster over the period 1997-2002. In northern France, the PPM was shown to spread across large agricultural areas through the ecological continuities created by trees outside forests (mostly ornamental trees scattered across fields and towns; Rossi et al, 2016). The subsequent diminution of the SP spread rate might be explained by the decrease in population densities typical of post-outbreak phases.…”

Section: A Climatic Niche Shift Induced By Allochronic Speciationmentioning

confidence: 99%

Climate constrains range expansion of an allochronic population of the pine processionary moth

Martin

Rocha

Santos

et al. 2016

Diversity and Distributions

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Aim Allochronic speciation occurs when sympatric populations sharing similar feeding regimes diverge because they mate at different times. Such speciation mode is fascinating because it permits the study of subsequent adaptations and/or geographic range shifts undergone by the populations that face new ecological constraints. Moreover, exploring whether intraspecific differentiation is accompanied by niche divergence is crucial for planning efficient biodiversity management and invasive species control. Here, we address the topic of potential climatic niche divergence between two sympatric populations of the pine processionary moth Thaumetopoea pityocampa (PPM) that diverged under allochrony. The larval development of a PPM population recently discovered in coastal regions of Portugal, referred to as the summer population (SP), occurs in the spring-summer instead of the autumn-winter as for all other populations of this species.Location Portugal.Methods We carried out intensive field sampling in the area where both populations are sympatric and calibrated spread (MigClim approach) and species distribution models (ensemble forecasting approach) to depict the response of SP to environment and predict its potential range under current and future climatic conditions. Results Since its discovery in 1997, the distribution of SP has been expanding along the Western coasts of Portugal. Still, its establishment in inland regions failed, even though suitable hosts occur. Our models identify maximal temperatures as the main constraint explaining SP absence from inland regions. The coastal area where winter populations and SP co-occur displays unique climatic conditions (moderate maximal and minimal temperatures), which enable the coexistence of these populations with totally different phenologies. The models predict a future decrease of SP range due to climate warming.Main conclusions We show here that a climatic niche shift occurred following allochronic divergence. This study highlights how climate differentially affects allochronic populations and how considering intraspecific diversity is crucial when predicting species responses to climate change.

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Section: A Climatic Niche Shift Induced By Allochronic Speciationmentioning

confidence: 99%

Climate constrains range expansion of an allochronic population of the pine processionary moth

Martin

Rocha

Santos

et al. 2016

Diversity and Distributions

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“…Scattered trees have many ecological functions in landscapes, for example, offering shelter and food sources for animals, enhancing landscape connectivity by acting as stepping stones, and functioning as nuclei for plant regeneration in disturbed landscapes (Crane, Lindenmayer, & Cunningham, ; Derroire et al., ; Fischer & Lindenmayer, ; Rossi, Garcia, Roques, & Rousselet, ). Moreover, scattered trees may enhance the provision of ecosystem services that might benefit farmers and owners of rural properties, such as pollination of crops, shading for cattle, regulation of nitrogen dynamics and carbon sequestration, herbaceous production, and wood provision (Barton et al., ; Belsky, ; Cottee‐Jones, Bajpai, Chaudhary, & Whittaker, ; Frost & McDougald, ; Hartel, Réti, & Craioveanu, ; Jackson, Strauss, Firestone, & Bartolome, ; Sanchez & Lindsell, ).…”

Section: Introductionmentioning

confidence: 99%

“…These dispersed elements are also known as remnant trees (Barth, Gibbon, & Wilson, 2015), pasture trees (Poltz & Zotz, 2011), isolated trees (Derroire, Coe, & Healey, 2016) and paddock trees (Fischer & Lindenmayer, 2002;Manning et al, 2006). Scattered trees have many ecological functions in landscapes, for example, offering shelter and food sources for animals, enhancing landscape connectivity by acting as stepping stones, and functioning as nuclei for plant regeneration in disturbed landscapes (Crane, Lindenmayer, & Cunningham, 2014;Derroire et al, 2016;Fischer & Lindenmayer, 2002;Rossi, Garcia, Roques, & Rousselet, 2016).…”

Section: Introductionmentioning

confidence: 99%

The importance of scattered trees for biodiversity conservation: A global meta‐analysis

Prevedello

Almeida‐Gomes

Lindenmayer

2017

Journal of Applied Ecology

125

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Scattered trees are thought to be keystone structures for biodiversity in landscapes world‐wide. However, such trees have been largely neglected by researchers and their importance for biodiversity remains unclear. We completed a global meta‐analysis to quantify relationships between scattered trees and the species richness, abundance and composition of vertebrates, arthropods and plants. First, we tested whether areas near scattered trees support higher levels of species richness and abundance than nearby open areas. Second, we compared levels of species richness and abundance in matrix areas with scattered trees and areas embedded within nearby habitat patches. We also compared the composition of biological communities inhabiting habitat patches, open areas and areas with scattered trees. A total of 62 studies contained suitable data for our quantitative analyses. The local abundance of arthropods, vertebrates and woody plants was 60%–430% greater and overall species richness was 50%–100% higher in areas with scattered trees than in open areas. Conversely, for herbaceous plants, there was no consistent relationship between species abundance and the occurrence of scattered trees, although species richness was, on average, 43% lower. The abundance and richness of all taxonomic groups was similar in matrix areas supporting scattered trees and habitat patches, although the species richness of epiphytes was, on average, 50% higher in habitat patches. Communities inhabiting habitat patches were more similar in composition to the communities inhabiting areas with scattered trees, and less similar to the communities of open areas. Synthesis and applications. Areas with scattered trees support greater levels of biodiversity than open areas, as well as communities that are more similar to those inhabiting habitat patches. Scattered trees can be regarded as keystone structures for vertebrates, arthropods and terrestrial plants in landscapes world‐wide. The maintenance of scattered trees may be compatible with livestock grazing in some agricultural landscapes. Greater management effort and targeted, long‐term policies are needed to retain or re‐establish scattered trees in many farming landscapes in both forest and non‐forest biomes around the world.

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“…The dataset was collected as part of a project focused on the citywide spatial distribution of the pine processionary moth Thaumetopoea pityocampa Denis and Schiffermüller (Lepidoptera, Notodontidae) [4]. This species is a pine defoliator (genus Pinus ) that occasionally feeds on other coniferous taxa such as Cedrus or Pseudotsuga under natural conditions [2].…”

Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

A dataset on the inventory of coniferous urban trees in the city of Orléans (France)

Rossi

Imbault²,

Lamant³

et al. 2016

Data in Brief

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The dataset supplied in this article provides the spatial location and the species composition of urban trees belonging to three coniferous genera (Pinus, Cedrus and Pseudotsuga) inventoried in 5 districts of the city of Orléans (France). A total of 9321 trees were georeferenced. The most abundant species was the black pine Pinus nigra for which a total of 2420 trees were observed. Other common species were the scots pine P. sylvestris, the Douglas-fir Pseudotsuga menziesii and different species of the genus Cedrus. The data supplied in this article are related to “A citywide survey of the pine processionary moth Thaumetopoea pityocampa spatial distribution in Orléans (France)” by J.-P. Rossi, V. Imbault, T. Lamant, J. Rousselet,) [3].

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Trees outside forests in agricultural landscapes: spatial distribution and impact on habitat connectivity for forest organisms

Cited by 46 publications

References 48 publications

Climate constrains range expansion of an allochronic population of the pine processionary moth

Climate constrains range expansion of an allochronic population of the pine processionary moth

The importance of scattered trees for biodiversity conservation: A global meta‐analysis

A dataset on the inventory of coniferous urban trees in the city of Orléans (France)

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