Water Relations in Two Species of Terrestrial Mosses

Anderson, Lewis E.; Bourdeau, Philippe F.

doi:10.2307/1933226

Cited by 46 publications

(19 citation statements)

References 3 publications

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“…Numerous water-loss experiments on cryptogams by others have yielded similar results (Heatwole 1966, Anderson and Bourdeau 1955, Scofield and Yarman 1943, Klepper 1968). The rate of this evaporation is directly related to the water vapor gradient from the plant to the free air surrounding the plant but is inversely related to the resistance of the pathway to the diffusion of water vapor.…”

supporting

confidence: 53%

An Energy Budget Approach to the Study of Water Loss in Cryptogams

Hoffman¹,

Gates²

1970

Bulletin of the Torrey Botanical Club

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supporting

confidence: 53%

An Energy Budget Approach to the Study of Water Loss in Cryptogams

Hoffman¹,

Gates²

1970

Bulletin of the Torrey Botanical Club

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“…Conversely, air humidity may be higher in some EG stands than in DA stands (Nihlgård, 1969) providing favourable growing conditions for mosses (Frisvoll & Presto, 1997). Almost all absorbed water, and the majority of absorbed nutrients, are provided by direct precipitation or forest throughfall; only the very top of the soil is exploited (Anderson & Bourdeau, 1955;Binkley & Graham, 1981;Weber & Van Cleve, 1984;Startsev et al, 2008). A thick moss layer may not be observed in some EG forests, such as frequently thinned stands.…”

Section: (2) Understorey: An Example Of Cascade Effectsmentioning

confidence: 99%

“…Because mosses have no root (only short rhizoids), no or limited cuticle, and very high SLA, they rely mainly on atmospheric inputs for their water and nutrient supply. Almost all absorbed water, and the majority of absorbed nutrients, are provided by direct precipitation or forest throughfall; only the very top of the soil is exploited (Anderson & Bourdeau, 1955;Binkley & Graham, 1981;Weber & Van Cleve, 1984;Startsev et al, 2008). Moss may thus act as an intercepting layer for water and nutrients, reducing their movement and recycling.…”

Section: Synthesis (1) Spermatophytes and Forest Functioningmentioning

confidence: 99%

Influences of evergreen gymnosperm and deciduous angiosperm tree species on the functioning of temperate and boreal forests

et al. 2014

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It has been recognized for a long time that the overstorey composition of a forest partly determines its biological and physical-chemical functioning. Here, we review evidence of the influence of evergreen gymnosperm (EG) tree species and deciduous angiosperm (DA) tree species on the water balance, physical-chemical soil properties and biogeochemical cycling of carbon and nutrients. We used scientific publications based on experimental designs where all species grew on the same parent material and initial soil, and were similar in stage of stand development, former land use and current management. We present the current state of the art, define knowledge gaps, and briefly discuss how selection of tree species can be used to mitigate pollution or enhance accumulation of stable organic carbon in the soil. The presence of EGs generally induces a lower rate of precipitation input into the soil than DAs, resulting in drier soil conditions and lower water discharge. Soil temperature is generally not different, or slightly lower, under an EG canopy compared to a DA canopy. Chemical properties, such as soil pH, can also be significantly modified by taxonomic groups of tree species. Biomass production is usually similar or lower in DA stands than in stands of EGs. Aboveground production of dead organic matter appears to be of the same order of magnitude between tree species groups growing on the same site. Some DAs induce more rapid decomposition of litter than EGs because of the chemical properties of their tissues, higher soil moisture and favourable conditions for earthworms. Forest floors consequently tend to be thicker in EG forests compared to DA forests. Many factors, such as litter lignin content, influence litter decomposition and it is difficult to identify specific litter-quality parameters that distinguish litter decomposition rates of EGs from DAs. Although it has been suggested that DAs can result in higher accumulation of soil carbon stocks, evidence from field studies does not show any obvious trend. Further research is required to clarify if accumulation of carbon in soils (i.e. forest floor + mineral soil) is different between the two types of trees. Production of belowground dead organic matter appears to be of similar magnitude in DA and EG forests, and root decomposition rate lower under EGs than DAs. However there are some discrepancies and still are insufficient data about belowground pools and processes that require further research. Relatively larger amounts of nutrients enter the soil-plant biogeochemical cycle under the influence of EGs than DAs, but recycling of nutrients appears to be slightly enhanced by DAs. Understanding the mechanisms underlying forest ecosystem functioning is essential to predicting the consequences of the expected tree species migration under global change. This knowledge can also be used as a mitigation tool regarding carbon sequestration or management of surface waters because the type of tree species affects forest growth, carbon, water and nutrient cycling.

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“…For the ectohydric non-vascular plants this is not unexpected since these are often thought to be dependent from atmospheric inputs for the bulk of their nutrients and water requirements (e.g. Anderson & Bourdeau 1955;Brown & Bates 1990). However, substrate dependency may not entirely be ruled out (Brown & Bates 1990).…”

Section: Suspended Soil Chemistry and The Distribution Of Epiphytesmentioning

confidence: 99%

Factors controlling the distribution of vascular and non-vascular epiphytes in the northern Andes

Wolf

1994

Vegetatio

115

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The epiphytic vegetation on host trees along an altitudinal transect on the west slope of the Central Cordillera in Colombia was sampled. Bark-type restricted sampling comprised four full-grown forest trees, not necessarily four species, at altitudinal intervals ofc. 200 meters from 1000 to 4130 m a.s.1, and included the canopy. Both vascular and non-vascular epiphytes, the latter often more abundant in the montane rain forest, were included in the analyses. Using a method of direct gradient analysis, canonical correspondence analysis, the variation explained by various environmental variables could be discriminated from a great amount of variation that seemed not related to any ecological factor. To a large extent, the randomness in propagule supply appears to determine the floristic composition on branch/trunk segments. The grouping of relev6s in a phytosociological analysis concurred with a clustering of samples in an ordination diagram of the first two extracted constrained axes. The sample scores on these two axes were strongly correlated with the complex variables 'altitude' and 'height within the host tree'. Specialists and generalists with respect to the two variables were defined based on tolerances provided by the canonical correspondence analysis as was the position of species on the gradients involved. Independently from any of the other variables entered, a relation between the epiphytic vegetation and host species was detected, particularly in the case ofBrunellia occidentalis, a fast growing tree species of higher altitude. No relation between chemical characteristics of suspended soil in the Upper Montane Rain forest and its supporting species could be demonstrated.

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Water Relations in Two Species of Terrestrial Mosses

Cited by 46 publications

References 3 publications

An Energy Budget Approach to the Study of Water Loss in Cryptogams

An Energy Budget Approach to the Study of Water Loss in Cryptogams

Influences of evergreen gymnosperm and deciduous angiosperm tree species on the functioning of temperate and boreal forests

Factors controlling the distribution of vascular and non-vascular epiphytes in the northern Andes

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