Divergent Norms of Reaction to Temperature in Germination Characteristics among Populations of the Arctic-Alpine Annual,<i>Koenigia islandica</i>

Wagner, Ioan; Simons, Andrew M.

doi:10.1657/1938-4246-41.3.388

Cited by 11 publications

(9 citation statements)

References 48 publications

(44 reference statements)

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“…A comprehensive vegetation description and analysis is available from Raffl et al (2006). Increasing soil and soil surface temperatures along the succession were observed (Kaufmann et al 2002), with the mean soil surface temperature of the growing season ranging from 7.5 to 9.0°C at a recently ice-free site to 10.5-12.0°C at a site of the late successional stage (2009 andE. Schwienbacher, unpublished data).…”

Section: Study Areamentioning

confidence: 99%

“…A generally high temperature requirement of alpine species was reported by Billings and Mooney (1968) who hypothesised that this trait allows species to avoid unfavourable autumn germination and to delay germination until the subsequent growing season. For freshly ripened seeds, these requirements may be even more pronounced, and the temperature range for successful germination is widened only after a period of cold stratification (Baskin and Baskin 1998;Wagner and Simons 2009).…”

Section: Germination Responses To Temperaturementioning

confidence: 99%

“…The optimum temperature of germination (T opt ) is commonly speciesspecific (Trudgill et al 2000) and affects the regeneration in terms of emergence timing and abundance of seedlings (Probert 2000). Although the germination responses of various alpine species have been widely investigated with respect to temperature (Billings and Mooney 1968;Cavieres and Arroyo 2000;Giménez-Benavides et al 2005;Shimono and Kudo 2005;Wagner and Simons 2009), knowledge on temperature ranges and T opt of alpine species is still scarce.…”

Section: Introductionmentioning

confidence: 99%

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Correspondence of seed traits with niche position in glacier foreland succession

et al. 2011

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Changes in species composition during succession are driven by biotic and abiotic factors leading to a multitude of niches occupied by distinct species. Gradient analyses of plant communities provide opportunities to approximate the niche position of species along a successional gradient. Several plant traits have been used to explain mechanisms governing successional sequences, but generalising changes in species traits during primary succession is still controversial. This study examined whether the seed mass and the optimum temperature for germination could explain the niche position of several glacier foreland species along a primary successional gradient in the Austrian Central Alps. We hypothesised that pioneer species should possess lighter seeds and a lower optimum temperature for germination than late successional species. We found significant differences in the seed mass between species, but the seed mass did not correspond with the assigned niche position on the successional gradient. Germination responses to temperature also differed significantly between species. Pioneer species performed better at lower temperatures than late successional species, suggesting that the optimum temperature for germination is a driver of niche separation. We discuss the interactions between seed traits and environmental conditions along the primary successional gradient emphasising the importance of temperature requirements for the germination. Differences in the regeneration characteristics are a major cue governing species turnover in glacier foreland succession.

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Section: Study Areamentioning

confidence: 99%

Section: Germination Responses To Temperaturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Correspondence of seed traits with niche position in glacier foreland succession

et al. 2011

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“…Although germination response to climatic factors has been investigated for alpine/subalpine species at population and community levels (Cao et al, ; Cavieres & Arroyo, ; Giménez‐Benavides, Escudero, & Pérez‐García, ; Liu et al, ; Shimono & Kudo, ; Wagner & Simons, ), knowledge of seed germination response of species in temperate desert regions is scarce at the community level. Knowledge of differential responses seed germination within and between species in a community is important in predicting community composition under future climate conditions.…”

Section: Introductionmentioning

confidence: 99%

Seed germination responses to seasonal temperature and drought stress are species‐specific but not related to seed size in a desert steppe: Implications for effect of climate change on community structure

Wang

Baskin

et al. 2019

Ecology and Evolution

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Investigating how seed germination of multiple species in an ecosystem responds to environmental conditions is crucial for understanding the mechanisms for community structure and biodiversity maintenance. However, knowledge of seed germination response of species to environmental conditions is still scarce at the community level. We hypothesized that responses of seed germination to environmental conditions differ among species at the community level, and that germination response is not correlated with seed size. To test this hypothesis, we determined the response of seed germination of 20 common species in the Siziwang Desert Steppe, China, to seasonal temperature regimes (representing April, May, June, and July) and drought stress (0, −0.003, −0.027, −0.155, and −0.87 MPa). Seed germination percentage increased with increasing temperature regime, but Allium ramosum , Allium tenuissimum , Artemisia annua , Artemisia mongolica, Artemisia scoparia , Artemisia sieversiana , Bassia dasyphylla, Kochia prastrata, and Neopallasia pectinata germinated to >60% in the lowest temperature regime (April). Germination decreased with increasing water stress, but Allium ramosum , Artemisia annua , Artemisia scoparia , Bassia dasyphylla, Heteropappus altaicus , Kochia prastrata , Neopallasia pectinata, and Potentilla tanacetifolia germinated to near 60% at −0.87 MPa. Among these eight species, germination of six was tolerant to both temperature and water stress. Mean germination percentage in the four temperature regimes and the five water potentials was not significantly correlated with seed mass or seed area, which were highly correlated. Our results suggest that the species‐specific germination responses to environmental conditions are important in structuring the desert steppe community and have implications for predicting community structure under climate change. Thus, the predicted warmer and dryer climate will favor germination of drought‐tolerant species, resulting in altered proportions of germinants of different species and subsequently change in community composition of the desert steppe.

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“…In seeds, germination timing is a critical stage in a plant's life history and plasticity in its timing has been found (Donohue et al 2005a;Donohue et al 2005;Donohue 2002;Sultan 1996;Simons 2009a, Wagner andSimons 2009b). S.…”

Section: Spirodela Polyrhiza Plasticity and Population Differentiationmentioning

confidence: 99%

The phenology of turion formation in Spirodela polyrhiza as an adaptation to unpredictable environments : implications for the evolution of bet hedging and phenotypic plasticity

Compton¹

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Divergent Norms of Reaction to Temperature in Germination Characteristics among Populations of the Arctic-Alpine Annual,Koenigia islandica

Cited by 11 publications

References 48 publications

Correspondence of seed traits with niche position in glacier foreland succession

Correspondence of seed traits with niche position in glacier foreland succession

Seed germination responses to seasonal temperature and drought stress are species‐specific but not related to seed size in a desert steppe: Implications for effect of climate change on community structure

The phenology of turion formation in Spirodela polyrhiza as an adaptation to unpredictable environments : implications for the evolution of bet hedging and phenotypic plasticity

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