Responses of orchids to habitat change in Corsica over 27 years

Vogt‐Schilb, Hélène; Pradel, Roger; Géniez, Philippe; Hugot, Laëtitia; Delage, Alain; Richard, Franck; Schatz, Bertrand

doi:10.1093/aob/mcw070

Cited by 21 publications

(15 citation statements)

References 42 publications

(58 reference statements)

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“…In contrast to previous studies investigating the response of common taxa 1,13,26 , no orchid group appeared to be favoured by climate warming, as even the most thermophilic species did not increase their population size in any part of their elevation range. This suggests that other drivers of population dynamics such as the loss of mutualistic interactions 39 or habitat degradation 32 , as shown in the resurvey, may play an important role in explaining population declines.…”

Section: Resultsmentioning

confidence: 86%

“…key drivers of orchid local extinction 32,35 . In particular, the observed loss and degradation of semi-natural grasslands have been related to declines in plant specialists 36 .…”

Section: Resultsmentioning

confidence: 99%

“…31 for a positive effect of warming on orchid populations). These declines are usually associated with land-use intensification or habitat loss 32,33 , coupled with the loss of mutualistic interactions with mycorrhizal fungi and pollinators 28 . Moreover, plant species in the southern European Alps are expected to shift upwards with a rate of 3.8-5.5 m year −1 to keep track of recent rates of warming 2 .…”

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confidence: 99%

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Consistent population declines but idiosyncratic range shifts in Alpine orchids under global change

et al. 2020

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Mountains are plant biodiversity hotspots considered particularly vulnerable to multiple environmental changes. Here, we quantify population changes and range-shift dynamics along elevational gradients over the last three decades for c. two-thirds of the orchid species of the European Alps. Local extinctions were more likely for small populations, after habitat alteration, and predominated at the rear edge of species’ ranges. Except for the most thermophilic species and wetland specialists, population density decreased over time. Declines were more pronounced for rear-edge populations, possibly due to multiple pressures such as climate warming, habitat alteration, and mismatched ecological interactions. Besides these demographic trends, different species exhibited idiosyncratic range shifts with more than 50% of the species lagging behind climate warming. Our study highlights the importance of long-term monitoring of populations and range distributions at fine spatial resolution to be able to fully understand the consequences of global change for orchids.

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Section: Resultsmentioning

confidence: 86%

“…key drivers of orchid local extinction 32,35 . In particular, the observed loss and degradation of semi-natural grasslands have been related to declines in plant specialists 36 .…”

Section: Resultsmentioning

confidence: 99%

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confidence: 99%

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Consistent population declines but idiosyncratic range shifts in Alpine orchids under global change

et al. 2020

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“…In Sardinia, this group is encompassed by four geographically, morphologically and ethologically well-defined microspecies. An interesting evolutionary question would be to analyze more precisely molecular patterns in co-occurring taxa at insular level [89,90]. Indeed, unfortunately, no molecular investigation involving these microspecies on a single island has yet been conducted, contributing to a lack of taxonomic clarity and therefore a proliferation of names not yet tested with scientific rigor.…”

Section: Discussionmentioning

confidence: 99%

A Synopsis of Sardinian Studies: Why Is it Important to Work on Island Orchids?

Lussu

Marignani

Lai

et al. 2020

Plants

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Biological and ecological investigations of islands are crucial to explain ecosystem functioning. Many studies on island biodiversity are carried out on oceanic islands. In contrast, information on continental islands, such as those in the Mediterranean Sea, is very often fragmented in space and time. Here, a synopsis of the Orchidaceae of Sardinia is presented based on literature surveys and recent botanical field studies. Our final list comprises of 64 species and 14 genera: thirteen species and subspecies were recognized as endemic and four new species were recorded for the flora of the island: Anacamptis palustris (Jacq.) R.M. Bateman, Pridgeon & M.W. Chase; Himantoglossum hircinum (L.) Spreng; Orchis italica Poir.; and Platanthera kuenkelei subsp. kuenkelei var. sardoa R.Lorenz, Akhalk., H.Baumann, Cortis, Cogoni & Scrugli. This orchid richness reflects the geological history of the island that was linked to the mainland several times, facing long periods of isolation. We also discuss a critical point-of-view of the biodiversity shortfalls still problematic for insular orchids. Indeed, within the Mediterranean Basin, the greatest amount of endemism occurs mainly on large islands, and, despite a long history of botanical exploration in European countries, many of them are scarcely investigated. This annotated synopsis shows the potential of continental islands to understand trends in ecology and evolution. Further studies are required to complete our knowledge of the orchid diversity on continental islands in order to propose scientific-based conservation programs to preserve these unique taxa.

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“…These authors predicted that, as a result of this habitat loss, many of the endemics in these hotspots are likely to become extinct or to be threatened with extinction in the near future. In a study of a Mediterranean island, Vogt-Schilb et al ( 2016 ) presented evidence of high turnover in species composition of orchids in communities as result of change in land use. There is also increasing evidence that global change may also be influencing species distributions (e.g.…”

Section: What Are the Threats?mentioning

confidence: 99%

Orchid conservation: how can we meet the challenges in the twenty-first century?

2018

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With c. 28,000 species, orchids are one of the largest families of flowering plants, and they are also one of the most threatened, in part due to their complex life history strategies. Threats include habitat destruction and climate change, but many orchids are also threatened by unsustainable (often illegal and/or undocumented) harvest for horticulture, food or medicine. The level of these threats now outstrips our abilities to combat them at a species-by-species basis for all species in such a large group as Orchidaceae; if we are to be successful in conserving orchids for the future, we will need to develop approaches that allow us to address the threats on a broader scale to complement focused approaches for the species that are identified as being at the highest risk.

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Responses of orchids to habitat change in Corsica over 27 years

Cited by 21 publications

References 42 publications

Consistent population declines but idiosyncratic range shifts in Alpine orchids under global change

Consistent population declines but idiosyncratic range shifts in Alpine orchids under global change

A Synopsis of Sardinian Studies: Why Is it Important to Work on Island Orchids?

Orchid conservation: how can we meet the challenges in the twenty-first century?

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