Article ; Online: Intraspecific trait variability is a key feature underlying high Arctic plant community resistance to climate warming
Ecological Monographs. 2023 Feb., v. 93, no. 1 p.e1555-
2023
Abstract: In the high Arctic, plant community species composition generally responds slowly to climate warming, whereas less is known about the community functional trait responses and consequences for ecosystem functioning. The slow species turnover and large ... ...
| Abstract | In the high Arctic, plant community species composition generally responds slowly to climate warming, whereas less is known about the community functional trait responses and consequences for ecosystem functioning. The slow species turnover and large distribution ranges of many Arctic plant species suggest a significant role of intraspecific trait variability in functional responses to climate change. Here we compare taxonomic and functional community compositional responses to a long‐term (17‐year) warming experiment in Svalbard, Norway, replicated across three major high Arctic habitats shaped by topography and contrasting snow regimes. We observed taxonomic compositional changes in all plant communities over time. Still, responses to experimental warming were minor and most pronounced in the drier habitats with relatively early snowmelt timing and long growing seasons (Cassiope and Dryas heaths). The habitats were clearly separated in functional trait space, defined by 12 size‐ and leaf economics‐related traits, primarily due to interspecific trait variation. Functional traits also responded to experimental warming, most prominently in the Dryas heath and mostly due to intraspecific trait variation. Leaf area and mass increased and leaf δ¹⁵N decreased in response to the warming treatment. Intraspecific trait variability ranged between 30% and 71% of the total trait variation, reflecting the functional resilience of those communities, dominated by long‐lived plants, due to either phenotypic plasticity or genotypic variation, which most likely underlies the observed resistance of high Arctic vegetation to climate warming. We further explored the consequences of trait variability for ecosystem functioning by measuring peak season CO₂ fluxes. Together, environmental, taxonomic, and functional trait variables explained a large proportion of the variation in net ecosystem exchange (NEE), which increased when intraspecific trait variation was accounted for. In contrast, even though ecosystem respiration and gross ecosystem production both increased in response to warming across habitats, they were mainly driven by the direct kinetic impacts of temperature on plant physiology and biochemical processes. Our study shows that long‐term experimental warming has a modest but significant effect on plant community functional trait composition and suggests that intraspecific trait variability is a key feature underlying high Arctic ecosystem resistance to climate warming. |
|---|---|
| Keywords | carbon dioxide ; climate ; climate change ; ecosystem respiration ; ecosystems ; genetic variation ; gross primary productivity ; leaf area ; leaves ; net ecosystem exchange ; phenotypic plasticity ; plant communities ; plant physiology ; snow ; snowmelt ; species diversity ; temperature ; topography ; vegetation ; Arctic region ; Norway |
| Language | English |
| Dates of publication | 2023-02 |
| Publishing place | John Wiley & Sons, Inc. |
| Document type | Article ; Online |
| Note | JOURNAL ARTICLE |
| ZDB-ID | 410216-2 |
| ISSN | 1557-7015 ; 0012-9615 |
| ISSN (online) | 1557-7015 |
| ISSN | 0012-9615 |
| DOI | 10.1002/ecm.1555 |
| Database | NAL-Catalogue (AGRICOLA) |
More links
Kategorien
In stock of ZB MED Bonn / Germany
| Z 74/716: Show issues | ||||
| Z 7541: Show issues | ||||
| + Dr 17: Show issues |
Order via subito
This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.
Inter-library loan at ZB MED
Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.