NDLI: Higher photosynthetic capacity and different functional trait scaling relationships in erect bryophytes compared with prostrate species

Content Provider	Springer Nature Link
Author	Wang, Zhe Liu, Xin Bao, Weikai
Copyright Year	2015
Abstract	Ecophysiological studies of bryophytes have generally been conducted at the shoot or canopy scale. However, their growth forms are diverse, and knowledge of whether bryophytes with different shoot structures have different functional trait levels and scaling relationships is limited. We collected 27 bryophyte species and categorised them into two groups based on their growth forms: erect and prostrate species. Twenty-one morphological, nutrient and photosynthetic traits were quantified. Trait levels and bivariate trait scaling relationships across species were compared between the two groups. The two groups had similar mean values for shoot mass per area (SMA), light saturation point and mass-based nitrogen (Nmass) and phosphorus concentrations. Erect bryophytes possessed higher values for mass-based chlorophyll concentration (Chlmass), light-saturated assimilation rate (A mass) and photosynthetic nitrogen/phosphorus use efficiency. Nmass, Chlmass and A mass were positively related, and these traits were negatively associated with SMA. Furthermore, the slope of the regression of Nmass versus Chlmass was steeper for erect bryophytes than that for prostrate bryophytes, whereas this pattern was reversed for the relationship between Chlmass and A mass. In conclusion, erect bryophytes possess higher photosynthetic capacities than prostrate species. Furthermore, erect bryophytes invest more nitrogen in chloroplast pigments to improve their light-harvesting ability, while the structure of prostrate species permits more efficient light capture. This study confirms the effect of growth form on the functional trait levels and scaling relationships of bryophytes. It also suggests that bryophytes could be good models for investigating the carbon economy and nutrient allocation of plants at the shoot rather than the leaf scale.
Starting Page	359
Ending Page	369
Page Count	11
File Format	PDF
ISSN	00298549
Journal	Oecologia
Volume Number	180
Issue Number	2
e-ISSN	14321939
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-11-09
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Growth form Life form Light interception Nutrient distribution Photosynthetic performance Ecology Plant Sciences Hydrology/Water Resources
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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