Recent developments in bryophyte population ecology

During, H. J.; Tooren, B.F. van

doi:10.1016/0169-5347(87)90164-9

Cited by 58 publications

(37 citation statements)

References 18 publications

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“…These results are confirmed by many previous studies (e.g. During, 1979During, , 1997During & ter Horst, 1983;During & van Tooren, 1987). Szű cs (2013) noticed similar species in the diaspore bank of Hungarian beech forests, namely, Pohlia nutans was the most abundant species, and Atrichum undulatum, Bryum spp.…”

Section: Comparison Of Diaspore Bank and Forestassemblagessupporting

confidence: 80%

Environmental drivers of the bryophyte propagule bank and its comparison with forest-floor assemblage in Central European temperate mixed forests

Kövendi-Jakó

Márialigeti

Bidló

et al. 2016

Journal of Bryology

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Species richness, composition and abundance of the bryophyte diaspore bank of Central European temperate mixed forests were compared with the forest-floor bryophyte assemblage. The impact of environmental variables and anthropogenic disturbances, including tree species composition, stand structure, microclimate, light conditions, soil and litter properties, management history, and landscape properties, potentially influencing bryophyte diaspore bank assemblages were explored. Thirty-four, 70-100 years old mixed stands with differing tree species composition were examined in the Ő rség National Park, Western Hungary. The diaspore bank was studied by soil collection and cultivation, and data were analysed by multivariate methods. Contrary to the forest-floor bryophyte assemblage, where substrate availability, tree species composition and stand structure were the most influential environmental variables, the composition and abundance of the diaspore bank was mainly affected by site conditions (microclimate, litter and soil properties). Species richness of the bryophyte diaspore bank was lower than that of the forest-floor bryophyte assemblage. Short-lived mosses (colonists, short-lived shuttles) were dominant in the diaspore bank, as opposed to the forest-floor bryophyte community, where perennial mosses dominated. In the studied forests, the importance of the bryophyte diaspore bank was relatively low in the regeneration and maintenance of the forest-floor bryophyte vegetation.

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Section: Comparison Of Diaspore Bank and Forestassemblagessupporting

confidence: 80%

Environmental drivers of the bryophyte propagule bank and its comparison with forest-floor assemblage in Central European temperate mixed forests

Kövendi-Jakó

Márialigeti

Bidló

et al. 2016

Journal of Bryology

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“…A similar claim, considering bryophytes in general, was made by During & van Tooren (1987), who gave many reasons why bryophytes could be used more broadly. We want to add two more reasons with regard to stream bryophytes specifically: (i) there are not many environments other than streams, where bryophytes are commonly the only macroscopic plant lifeform present; (ii) because many stream mosses are practically free from herbivory (but see e.g.…”

Section: A Tentative Life Strategy Scheme For Stream Bryophytesmentioning

confidence: 65%

“…Slack (1990) viewed montane stream bryophytes as opportunistic species, whose guild structure is controlled primarily by non-equilibrium processes, However, perennial mosses of some highly permanent habitats (e.g. mires, forest floor) are known to compete for space (Rydin, 1993; see also During & van Tooren, 1987). Apparently some of the lake outlets and river riffles studied by us are among the most stable of all habitats occupied by bryophytes.…”

Section: Discussionmentioning

confidence: 96%

The stream as a habitat templet for bryophytes: species' distributions along gradients in disturbance and substratum heterogeneity

1995

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1. The structure of bryophyte communities in streams in relation to habitat characteristics,, especially disturbance, is described. Disturbance in rivers is quantified as movement of the stream bed, whereas in small streams water level fluctuation is used as an indicator of disturbance frequency. 2. Canonical correspondence analysis differentiated frequently disturbed sites from more stable ones. The existence of a disturbance gradient was confirmed in a subset of the study sites using long-term records of discharge variation. A parallel change was detected in the species composition of bryophyte communities with low-statured, potentially fast colonizers dominating the disturbed end and large perennial species the stable end of the gradient. 3. A consistent pattern of zonation of bryophyte species was found along the gradient from continually submersed to persistently dry conditions in small streams and lake outlets. An abrupt increase in species richness occurred at or just above the water line, where facultatively aquatic species tolerant of both conditions formed the bulk of the community. 4. The relationship between species richness and standing crop in stream bryophyte communities was consistent with the hump-backed model of Grime (1979), especially at the within-habitat scale. Quadrats of low and very high standing crop were characterized by low species richness, while peak richness was observed at intermediate standing crops. 5. A few perennial species (e.g. Fontinalis spp. and Rhynchostegium riparioides) capable of monopolizing space dominated the most stable habitats. Species composition in low biomass sites was more variable, yet only one basic growth-form (small-statured species with high allocation to spore production) seemed possible in these highly disturbed streams. In habitats of intermediate biomass, small-scale disturbances apparently allow the formation of a more varied bryophyte community. 6. A habitat templet for stream bryophyte life strategies and community structure is presented. Disturbance is proposed to be the factor filtering out traits unsuitable for a given environment. The potential of stream bryophytes for testing and developing general ecological theory is emphasized.

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“…The constraints upon recolonization are not known, but could be related to the failure of propagules to arrive at the sites of disturbance, low rates of retention of propagules at such sites, or physicochemical conditions that prevent plants' establishment and growth there. The relative importance of these three types of constraints -arrival, retention, and establishment -are unknown, but studies of both epiphytes and many terrestrial bryophyte systems have stressed the potential that limitation in dispersal can have for increasing randomness and co-existence of ecologically similar species (Düring and van Tooren 1986;Slack 1990;Kimmerer 1991;Wolf 1994;Benzing 1995).…”

Section: Introductionmentioning

confidence: 99%

Interception and retention of macroscopic bryophyte fragments by branch substrates in a tropical cloud forest: an experimental and demographic approach

Nadkarni

Cobb

Solano³

2000

Oecologia

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Although the significance of canopy plant communities to ecosystem function is well documented, the process by which such communities become established in trees remains poorly known. Colonization of tree surfaces by canopy-dwelling plants often begins with the establishment of bryophytes, so the conditions that affect the dispersal of bryophytes in the forest canopy merit study. We assessed success rates of one mechanism of bryophyte propagation, the aerial dispersal of macroscopic fragments, using an experimental approach. We quantified interception and retention of marked fragments released from a 36 cm×36 cm grid 50 cm above branches of saplings and mature trees of the species Ocotea tonduzii in a montane cloud forest in Costa Rica. Only 1% of bryophyte fragments dropped over sapling crowns in this manner were retained for the 6-month duration of the study, while branches in the forest canopy with intact epiphyte loads and branches that had been stripped of their epiphytes retained 24% and 5%, respectively. Our results suggest that larger-diameter branches and the presence of other epiphytes can both improve the retention of bryophyte fragments on canopy branches. Further work will be needed to address the relative roles of other dispersal mechanisms (spores, gemmae, microscopic bryophyte fragments) and the dynamics of growth and establishment of macroscopic bryophyte fragments following their interception.

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Recent developments in bryophyte population ecology

Cited by 58 publications

References 18 publications

Environmental drivers of the bryophyte propagule bank and its comparison with forest-floor assemblage in Central European temperate mixed forests

Environmental drivers of the bryophyte propagule bank and its comparison with forest-floor assemblage in Central European temperate mixed forests

The stream as a habitat templet for bryophytes: species' distributions along gradients in disturbance and substratum heterogeneity

Interception and retention of macroscopic bryophyte fragments by branch substrates in a tropical cloud forest: an experimental and demographic approach

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