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9 results for “western limit of the range”
Data from: Adaptive limitations of white spruce populations to drought imply vulnerability to climate change in its western range
A cost-effective climate change adaptation strategy for the forestry sector is to move seed sources to more northern and higher elevation planting sites as part of ongoing reforestation programs. This is meant to match locally adapted populations with anticipated environments, but adaptive traits do not always show population differences suitable to mitigate climate change impacts. For white spruce, drought tolerance is a critical adaptive trait to prevent mortality and productivity losses. Here, we use a 40 year old provenance experiment that has been exposed to severe drought periods in 1999 and 2002 to retrospectively investigate drought response and the adaptive capacity of white spruce populations across their boreal range. Relying on dendrochronological analysis under experimentally controlled environments, we evaluate population differences in resistance, resilience and recovery to these extreme events. Results showed evidence for population differentiation in resistance and recovery parameters, but provenances conformed to approximately the same growth rates under drought conditions and had similar resilience metrics. The lack of populations with better growth rates under drought conditions is contrary to expectations for a wide-ranging species with distinct regional climates. Populations from the wettest environments in the northeastern boreal were surprisingly drought tolerant, suggesting that these populations would readily resist water deficits projected for the 2080s, and supporting the view that northeastern Canada will provide a refugium for boreal species under climate change. The findings also suggest that white spruce is sensitive to growth reductions under climate change in the western boreal. The study highlights that population differentiation in adaptive capacity is species and trait specific, and we provide a counter example for drought tolerance traits, where assisted migration prescriptions may be ineffective to mitigate climate change impacts. For resource managers and policy makers, we provide maps where planning for widespread declines of boreal white spruce forests may be unavoidable.
Distribution. Throughout mainland SE Asia, from C & S Myanmar to W & SE Thailand, C & S Laos, Cambodia, C & S Vietnam, and Peninsular Malaysia; also present in Borneo, Sumatra, Java, Bali, Lombok, and several adjacent small islands. Most likely extinct from E Bangladesh, where it has not been reported for more than 40 years. Northern and western limits of its range are poorly known. in Manidae
Distribution. Throughout mainland SE Asia, from C & S Myanmar to W & SE Thailand, C & S Laos, Cambodia, C & S Vietnam, and Peninsular Malaysia; also present in Borneo, Sumatra, Java, Bali, Lombok, and several adjacent small islands. Most likely extinct from E Bangladesh, where it has not been reported for more than 40 years. Northern and western limits of its range are poorly known.
Fig. 2 in Cordulegaster bidentata Selys, 1843 in fragmented landscape of the Wielickie Foothills: reassesement of the northern limit of species range in the Western Carpathians
Fig. 2. Distribution of Cordulegaster bidentata in Poland. 1 – known range, 2 – potential range (according to Bernard et al. 2009, Smolis et al. 2012), 3 – disjuntive site in the Wiśnickie Foothills (Kłonowska-Olejnik & Buczyński 2014), 4 – past record of single imago from Kraków (Prüffer 1920), 5 – northern border of the Carpathians, 6 – state border, 7 – main rivers, 8 – study area.
Fig. 3 in Cordulegaster bidentata Selys, 1843 in fragmented landscape of the Wielickie Foothills: reassesement of the northern limit of species range in the Western Carpathians
Fig. 3. Map of the study area and discovered sites of Cordulegaster bidentata. 1 – study area, 2 – forests, 3 – cities, 4 – watercourses, 5 – searched stream sections, 6 – localities of C. bidentata larvae.
Distribution. Endemic to Western Australia, limited mostly to the Pilbara region (broadly distributed from the W coast through to C Pilbara, from the Cape Range to Telfer), but also found in the Gascoyne region and the Little Sandy Desert. in Dasyuridae
Distribution. Endemic to Western Australia, limited mostly to the Pilbara region (broadly distributed from the W coast through to C Pilbara, from the Cape Range to Telfer), but also found in the Gascoyne region and the Little Sandy Desert.
Subspecies and Distribution. P.l.lateralisGould,1842—patchilyacrossSWesternAustralia,includingCapeRange,LittleSandyDesert,andthenearKellerberrininWheatbelt;alsoBarrowIandSalisburyI. P.l.hackettiThomas,1905—islandsofWilson,Mondrain,andWestall(RechercheArchipelago),WesternAustralia.Mayhaveoccurredhistoricallyalsoonadjacentmainland. P. l. pearson: Thomas, 1922 — North Pearson I, Investigator Group, South Australia. Introduced to South and Middle Pearson, Thistle, and Wedge Is, South Australia. A hitherto undescribed subspecies, the West Kimberley race, occurs (distributional limits uncertain) in Edgar, Grant, and Erskine Ranges and on Mt Wynne, Mt Anderson, and Mt Alexander, in S West Kimberley, Western Australia. A second undescribed subspecies, the MacDonnell Ranges race, is present in MacDonnell Ranges of C Australia, extending to E Western Australia and N South Australia. in Macropodidae
Subspecies and Distribution. P.l.lateralisGould,1842—patchilyacrossSWesternAustralia,includingCapeRange,LittleSandyDesert,andthenearKellerberrininWheatbelt;alsoBarrowIandSalisburyI. P.l.hackettiThomas,1905—islandsofWilson,Mondrain,andWestall(RechercheArchipelago),WesternAustralia.Mayhaveoccurredhistoricallyalsoonadjacentmainland. P. l. pearson: Thomas, 1922 — North Pearson I, Investigator Group, South Australia. Introduced to South and Middle Pearson, Thistle, and Wedge Is, South Australia. A hitherto undescribed subspecies, the West Kimberley race, occurs (distributional limits uncertain) in Edgar, Grant, and Erskine Ranges and on Mt Wynne, Mt Anderson, and Mt Alexander, in S West Kimberley, Western Australia. A second undescribed subspecies, the MacDonnell Ranges race, is present in MacDonnell Ranges of C Australia, extending to E Western Australia and N South Australia.
Data from: Adaptive limitations of white spruce populations to drought imply vulnerability to climate change in its western range
Open the record for dataset details and reuse information.
Data from: Low photosynthesis of treeline white spruce is associated with limited soil nitrogen availability in the Western Brooks Range, Alaska
Open the record for dataset details and reuse information.
Fig. 1 in Cordulegaster bidentata Selys, 1843 in fragmented landscape of the Wielickie Foothills: reassesement of the northern limit of species range in the Western Carpathians
Fig. 1. Global range of Cordulegaster bidentata (dark grey), according to IUCN (2009).
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OpenNeuro
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