Theories on adaptations to high light intensity in the aquatic moss<i>Fontinalis</i>

Glime, Janice M.

doi:10.1179/jbr.1984.13.2.257

Cited by 17 publications

(13 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These results indicated that the difference between microhabitats was driven by turf and cushion mosses rather than weft mosses at ground layer. And, with the exception of P. inflexum in the ground layer, Chl a/b ratios <2 indicated that bryophytes in the montane forest tend to be adapted to shade conditions (Glime, ; Chen et al., ).…”

Section: Discussionmentioning

confidence: 99%

A combination of morphological and photosynthetic functional traits maintains the vertical distribution of bryophytes in a subtropical cloud forest

Fan

Liu

Song

et al. 2020

American J of Botany

View full text Add to dashboard Cite

Premise The distribution and performance of bryophyte species vary with vertical gradients, as a result of changes in environmental factors, especially light. However, the morphological and physiological drivers of bryophyte distribution along forest vertical gradients are poorly understood. Methods For 18 species of mosses and liverworts distributed among three vertical microhabitats (ground, tree trunk, and branch, variance in 28 morphological and photosynthetic functional traits was comparatively analyzed among the microhabitats and bryophyte life‐forms in a subtropical cloud forest in Ailao Mountain, Yunnan, southwestern China. Principal component analysis (PCA) was used to summarize trait differences among bryophyte species. Results In contrast to trunk and ground dwellers, branch dwellers tended to reduce light interception (smaller leaf and cell sizes, lower chlorophyll content), protect against damage from intense irradiation (higher ratios of carotenoids to chlorophyll), raise light energy use (higher photosynthetic capacity), and cope with lower environmental moisture (pendant life‐forms, thicker cell walls). The PCA showed that ecological strategies of bryophytes in response to levels of irradiation were specialized in branch dwellers, although those of ground and trunk dwellers were less distinct. Conclusions Environmental filtering shaped the combination of functional traits and the spatial distribution of bryophytes along the vertical gradients. Bryophyte species from the upper canopy of cloud forests show narrow variation in functional traits in high‐light intensity, whereas species in the lower vertical strata associated with low‐light intensity used contrasting, but more diverse ecological strategies.

show abstract

Section: Discussionmentioning

confidence: 99%

A combination of morphological and photosynthetic functional traits maintains the vertical distribution of bryophytes in a subtropical cloud forest

Fan

Liu

Song

et al. 2020

American J of Botany

View full text Add to dashboard Cite

show abstract

“…In fact only in Section 3, and to a lower extent, in Sections 2 and 4, aquatic mosses, which occur in the Ronetsbach, become dominant. According to the RI method (Schaumburg et al, 2004a), Calliergon giganteum and C. commutatum, both species growing in the Ronetsbach and C. commutatum even prevailing in Section 3, belong to species group A of the type MRK, while Fontinalis antipyretica, more diffused in other sections, is a species B and is able to adapt also to high light intensity (Glime, 1984).…”

Section: Article In Pressmentioning

confidence: 99%

Macrophyte-based bioindication in rivers – A comparative evaluation of the reference index (RI) and the trophic index of macrophytes (TIM)

Fabris¹,

Schneider

Melzer³

2009

Limnologica

View full text Add to dashboard Cite

Submerged macrophyte vegetation has been mapped in four calcareous groundwater-fed streams in Bavaria (southern Germany) in order to compare and assess two different methods of river bioindication. The first one, the trophic index of macrophytes (TIM), is a tool to assess the trophic status of running waters. In contrast, the reference index (RI) is an ecological index which evaluates the difference between a reference community and the actual submerged vegetation, depending on the river type, as required by the Water Framework Directive. Water nutrient concentrations were measured once at selected sites in all water courses.The TIM reflects water phosphorus concentrations, accounting also for nutrients enrichment in the sediment, and is not influenced by shading, depth, substrate and flow velocity of the water course. The TIM is very sensitive to small variations in P concentration when the P level is low, while the index tends to a maximum as soluble reactive phosphorus (SRP) and total phosphorus (Ptot) exceed a certain value.The RI indicates river ecological status which is not only influenced by trophic status but by every factor leading to a deviation of the actual macrophyte community from the reference community. In the investigated rivers the RI indicated reduced flow velocity caused by milldams and shading by riparian vegetation, in addition to trophic status.In rivers that are at the boundary between two different river types, classification of river type can play a crucial role for river status assessment. Incorrect classification of river type can lead to both, a ''too good'' and ''too bad'' assessment.

show abstract

“…Glime (1984b), for example, found that Fontinalis antipyretica would produce red pigments in response to bright light, but that these pigments were also induced by stress and by ethylene (Glime and Rowher 1983). It is possible that cold temperatures and CO2 concentrations above ambient enhance growth of bryophytes in streams where high light levels might otherwise interfere with growth, or induce competition from other plants.…”

Section: Lightmentioning

confidence: 99%

Roles of Bryophytes in Stream Ecosystems

1999

Journal of the North American Benthological Society

126

View full text Add to dashboard Cite

JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org.Abstract. Aquatic bryophytes are a common but often overlooked component of a wide variety of stream ecosystems. Although stream environments present a number of challenges for bryophyte reproduction and survival, some bryophytes have characteristics that allow them to persist in a wide variety of stream types (e.g., adaptations to low light and temperature, rapid nutrient uptake, resistance to scouring and spates). Primary production by aquatic bryophytes can equal or exceed that by epilithic and periphytic algae, which have been much more widely studied. Also, it is clear that bryophytes can profoundly influence both the abundance and community structure of stream invertebrates. However, a number of fundamentally important roles of bryophytes in stream ecosystems remain unexamined. Very little is known, for example, about the dynamics of nutrient uptake by bryophytes. The dynamics of nutrient regeneration from decomposing bryophyte tissues are essentially unknown. Nor is it known whether bryophytes increase or decrease the habitat quality for stream trophic levels other than stream invertebrates. For example, ecological interactions between bryophytes and epiphytic microorganisms are potentially important but unknown. Similarly, it is not clear whether fish benefit from the increased abundance of insects often observed when bryophytes are present in streams. The purpose of this review is to summarize the existing literature on the functions of bryophytes as important ecosystem components, rather than as simple environmental indicators. We hope that this information will foster a greater appreciation for the potential functions of these organisms, and will stimulate additional research that will improve our knowledge of wholestream ecosystem dynamics.Bryophytes may profoundly alter the structure and function of stream ecosystems. They can substantially alter the abundance and community structure of stream fauna, and they have the potential to compete effectively for resources such as space, nutrients, and light. However, their impacts on fundamental ecosystem processes such as production, decomposition, and nutrient regeneration are poorly known. Despite the potential importance of these impacts, research on bryophytes as functional components of stream ecosystems is sparse. A literature search of the last 10 y of Biological Abstracts showed that <1% of the world literature on aquatic ecology addresses bryophyte ecology (W. B. Bowden and D. B. Arscott, unpublished data). Furthermore, <5-10% of the literature published on aquatic bryophytes in the last 10 y deals with ecosystem-level processes. A number of fundamental questions about bryophytes as functional components of stream ec...

show abstract

Theories on adaptations to high light intensity in the aquatic mossFontinalis

Cited by 17 publications

References 21 publications

A combination of morphological and photosynthetic functional traits maintains the vertical distribution of bryophytes in a subtropical cloud forest

A combination of morphological and photosynthetic functional traits maintains the vertical distribution of bryophytes in a subtropical cloud forest

Macrophyte-based bioindication in rivers – A comparative evaluation of the reference index (RI) and the trophic index of macrophytes (TIM)

Roles of Bryophytes in Stream Ecosystems

Contact Info

Product

Resources

About