Flowering phenology in alpine grassland strongly responds to shifts in snowmelt but weakly to summer drought

نویسندگان

چکیده

Abstract Alpine plants complete their seasonal phenological cycle during two to three snow-free months. Under climate change, snowmelt advances and the risk of summer droughts increases. Yet, photoperiodism may prevent alpine from benefiting an earlier start growing season. To identify drivers flowering phenology in seven main species grassland, we experimentally shifted date through snow manipulations, excluded precipitation summer. With “time-to-event” models, analysed beginning with respect temperature sums, time after snowmelt, calendar day (photoperiod). We identified types: four tracking dates directly or a certain lag set by including dominant sedge Carex curvula , Anthoxanthum alpinum Helictotrichon versicolor Trifolium photoperiod: Geum montanum Leontodon helveticus Potentilla aurea . Photoperiodism did not act as daylength threshold but rather modulated thermal sums at flowering. Hence, photoperiod delayed snowmelt. The grass A. was only one that clearly responded drought longer remarkably high importance for both types suggests onset warmer climate, particularly non-photoperiod-sensitive species, increasing freezing damages potential disruptions biotic interactions most frequent type grassland across Alps. Consequentially, distinct microclimate species-specific responses challenge temperature-only based projections warming effects on plant species.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Grassland Phenology Response to Drought in the Canadian Prairies

Drought is a significant climatic disturbance in grasslands, yet the impact drought caused by global warming has on grassland phenology is still unclear. Our research investigates the long-term variability of grassland phenology in relation to drought in the Canadian prairies from 1982 to 2014. Based on the start of growing season (SOG) and the end of growing season (EOG) derived from Global In...

متن کامل

Flowering phenology in a species-rich temperate grassland is sensitive to warming but not elevated CO2.

* Flowering is a critical stage in plant life cycles, and changes might alter processes at the species, community and ecosystem levels. Therefore, likely flowering-time responses to global change drivers are needed for predictions of global change impacts on natural and managed ecosystems. * Here, the impact of elevated atmospheric CO2 concentration ([CO2]) (550 micromol mol(-1)) and warming (+...

متن کامل

Flowering phenology shifts in response to biodiversity loss.

Observational studies and experimental evidence agree that rising global temperatures have altered plant phenology-the timing of life events, such as flowering, germination, and leaf-out. Other large-scale global environmental changes, such as nitrogen deposition and altered precipitation regimes, have also been linked to changes in flowering times. Despite our increased understanding of how ab...

متن کامل

Shifts in flowering phenology reshape a subalpine plant community.

Phenology--the timing of biological events--is highly sensitive to climate change. However, our general understanding of how phenology responds to climate change is based almost solely on incomplete assessments of phenology (such as first date of flowering) rather than on entire phenological distributions. Using a uniquely comprehensive 39-y flowering phenology dataset from the Colorado Rocky M...

متن کامل

Phenological response of grassland species to manipulative snowmelt and drought along an altitudinal gradient

Plant communities in the European Alps are assumed to be highly affected by climate change, as the temperature rise in this region is above the global average. It is predicted that higher temperatures will lead to advanced snowmelt dates and that the number of extreme weather events will increase. The aims of this study were to determine the impacts of extreme climatic events on flower phenolog...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Alpine Botany

سال: 2021

ISSN: ['1664-221X', '1664-2201']

DOI: https://doi.org/10.1007/s00035-021-00252-z