Genetic Evidence of Introgressive Invasion of the Globally Imperiled Scirpus longii by the Weedy Scirpus cyperinus (Cyperaceae) in Nova Scotia

MacKay, R. A.; Reid, Sarah; William, Robert; Hill, Nicholas M.

doi:10.3119/08-22.1

Cited by 2 publications

(4 citation statements)

References 23 publications

(25 reference statements)

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“…Natural flowering of S. longii is very infrequent and thus the species' potential to migrate via transport of seed is extremely limited. Historically, fire has been the primary stimulant for culm production (MacKay et al, ; Rawinski ; Schuyler & Stazs, ) and probably facilitated post‐glacial migration. In an analysis of charcoal deposited since the LGM, Power et al () demonstrated that the frequency of fire in eastern North America peaked at about 12 ka and began to decline after about 9 ka.…”

Section: Discussionmentioning

confidence: 99%

“…We recommend that development in this populous region of Massachusetts take extra care to maintain the current hydrology at Noquochoke, that beaver dams are dismantled as needed, and that eutrophication of the wetland and the encroachment of weedy and woody species be prevented. It is particularly important that disturbance be avoided as Scirpus cyperinus , the weedy relative of S. longii, is known to hybridize with and introgress S. longii populations (MacKay et al, ). As funds for conservation are limited, it would be advisable to focus on maintaining the genetic diversity harboured within this Noquochoke population.…”

Section: Discussionmentioning

confidence: 99%

“…The largest reported clones have a diameter in excess of 50 m (Hill & Johansson, 1992). Thus, undisturbed clones may live for hundreds of years (Hill, 1994;MacKay, Reid, William, & Hill, 2010). Reports differ on what induces culm production.…”

Section: The Eastern North American Atlantic Coastal Plain Flora (Acpf)mentioning

confidence: 99%

“…Historically, fire has been the primary stimulant for culm production (MacKay et al, 2010;Rawinski 2001;Schuyler & Stazs, 1985) and…”

Section: The Future Of the Northern Acpfmentioning

confidence: 99%

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Phylogeography, population genetics and distribution modelling reveal vulnerability of Scirpus longii (Cyperaceae) and the Atlantic Coastal Plain Flora to climate change

2019

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A proactive approach to conservation must be predictive, anticipating how habitats will change and which species are likely to decline or prosper. We use composite species distribution modelling to identify suitable habitats for 18 members of the North American Atlantic Coastal Plain Flora (ACPF) since the Last Glacial Maximum and project these into the future. We then use Scirpus longii (Cyperaceae), a globally imperiled ACPF sedge with many of the characteristics of extinction vulnerability, as a case study. We integrate phylogeographical and population genetic analyses and species distribution modelling to develop a broad view of its current condition and prognosis for conservation. We use genotyping‐by‐sequencing to characterize the genomes of 142 S. longii individuals from 20 populations distributed throughout its range (New Jersey to Nova Scotia). We measure the distribution of genetic diversity in the species and reconstruct its phylogeographical history using the snapp and rase models. Extant populations of S. longii originated from a single refugium south of the Laurentide ice sheet around 25 ka. The genetic diversity of S. longii is exceedingly low, populations exhibit little genetic structure and the species is slightly inbred. Projected climate scenarios indicate that nearly half of extant populations of S. longii will be exposed to unsuitable climate by 2070. Similar changes in suitable habitat will occur for many other northern ACPF species—centres of diversity will shift northward and Nova Scotia may become the last refuges for those species not extinguished.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: The Eastern North American Atlantic Coastal Plain Flora (Acpf)mentioning

confidence: 99%

“…Historically, fire has been the primary stimulant for culm production (MacKay et al, 2010;Rawinski 2001;Schuyler & Stazs, 1985) and…”

Section: The Future Of the Northern Acpfmentioning

confidence: 99%

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Phylogeography, population genetics and distribution modelling reveal vulnerability of Scirpus longii (Cyperaceae) and the Atlantic Coastal Plain Flora to climate change

2019

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Management of the margins in cutover bogs: ecological conditions and effects of afforestation

Paradis

Rochefort

2016

Wetlands Ecol Manage

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Genetic Evidence of Introgressive Invasion of the Globally Imperiled Scirpus longii by the Weedy Scirpus cyperinus (Cyperaceae) in Nova Scotia

Cited by 2 publications

References 23 publications

Phylogeography, population genetics and distribution modelling reveal vulnerability of Scirpus longii (Cyperaceae) and the Atlantic Coastal Plain Flora to climate change

Phylogeography, population genetics and distribution modelling reveal vulnerability of Scirpus longii (Cyperaceae) and the Atlantic Coastal Plain Flora to climate change

Management of the margins in cutover bogs: ecological conditions and effects of afforestation

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