Relationship of Bryophyte Occurrence to Rock Type in Upstate New York and Coastal Maine

Cleavitt, Natalie L.; Williams, Susan A.; Slack, Nancy G.

doi:10.1656/045.016.0106

Cited by 7 publications

(5 citation statements)

References 18 publications

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“…Our results also indicate that the bedrock type significantly affects bryophyte species composition, which confirms findings of previous studies (Bates, ; Cleavitt, Williams, & Slack, ; Shacklette, ; Smith, ) and highlights the potential importance of substratum properties in determining the diversity of epilithic bryophyte assemblages.…”

Section: Discussionsupporting

confidence: 91%

“…In fact, while the former indirectly addresses the supplies of water vapour from the ocean to the different sites, the latter, by defining important structural (density and height of canopy cover) and physiological (evapotranspiration levels) environmental constraints, accounts for the permanence of air humidity close to the ground and its availability for bryophytes. Our results also indicate that the bedrock type significantly affects bryophyte species composition, which confirms findings of previous studies (Bates, 1978;Cleavitt, Williams, & Slack, 2009;Shacklette, 1961;Smith, 1982) and highlights the potential importance of substratum properties in determining the diversity of epilithic bryophyte assemblages. can be seen, neither for bryophytes overall nor for liverworts, and the effect on mosses is also small.…”

Section: Ordination Analysis and Variation Partitioningsupporting

confidence: 91%

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Drivers of distance‐decay in bryophyte assemblages at multiple spatial scales: Dispersal limitations or environmental control?

Cacciatori

Tordoni

Petruzzellis

et al. 2020

J Vegetation Science

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Questions Despite the increasing scientific interest in distance decay of compositional similarity in ecology, the scale dependence of geographical versus environmental control on distance decay of biological communities has not been properly addressed so far. The present work highlights the relative importance of niche‐based processes versus dispersal limitations on distance decay patterns of epilithic bryophyte assemblages at different spatial scales. Location Serra de Sintra, central Portugal. Methods We adopted a nested sampling design with 32 selected sampling sites in each of which two clusters, each with five rocks, were surveyed. Each cluster was characterized by a set of 15 macroscale variables, which were divided into environmental and anthropogenic. For each rock eight microscale variables were recorded. Partial Mantel tests were used to assess the relative importance of geographical and environmental distance on community dissimilarity for each grain size (site, cluster, rock). Quantile regressions were used to describe the decay patterns of community similarity with respect to geographical and environmental distances. Ordination analyses and variation partitioning techniques were applied to assess the pure and shared effects of measured variables on bryophyte community composition. Results Environmental distance based upon macroscale predictors was significantly correlated to community similarity, while no significant correlation was found for ecological distance calculated for microscale predictors, except at the largest grain size. The decrease of community similarity with geographical and environmental distance was thus consistently strengthened with increasing sample grain. Compositional variation was best explained by anthropogenic variables. Conclusions The relative importance of environmental versus geographical distance on compositional similarity in epilithic bryophyte communities varies with the spatial scale of the predictors and with the sample grain. The decrease of similarity with increasing distance is related to changes in habitat features, especially those driven by human disturbance, while it is weakly affected by variations in substrate features.

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Section: Discussionsupporting

confidence: 91%

Section: Ordination Analysis and Variation Partitioningsupporting

confidence: 91%

Drivers of distance‐decay in bryophyte assemblages at multiple spatial scales: Dispersal limitations or environmental control?

Cacciatori

Tordoni

Petruzzellis

et al. 2020

J Vegetation Science

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“…In contrast, serpentine sites dominated by native vascular plants were characterized by colonist shade-intolerant bryophyte species typical of rocky and bare soils (e.g., Didymodon vinealis and Syntrichia princeps). These effects of serpentine on bryophyte assemblages in Californian grasslands resemble the effects seen in other regions (Briscoe et al 2009;Cleavitt et al 2009;Rajakaruna et al 2009). …”

Section: Discussionsupporting

confidence: 63%

Bryophyte diversity in Californian grasslands in relation to substrate quality, exotic vascular plants and disturbance

2014

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Bryophyte communities of semi-arid grassland ecosystems are little studied, and it is poorly known how they vary in relation to soil quality, disturbance and the invasion status of vascular plants. By analogy with short-statured, competitively inferior native vascular plants, we hypothesized that bryophytes would show high beta diversity and increasing alpha diversity along a gradient from productive non-serpentine grasslands dominated by exotics to low productivity serpentine grasslands dominated by native vascular plants. We also predicted that disturbance by gophers would benefit bryophyte alpha and beta diversity, especially at the productive end of the soil fertility gradient. We sampled bryophytes in 48 sites in a 3,000 ha landscape in the Inner Coast Range of California, USA. We used several multivariate (non-metric multidimensional scaling, PERMDISP) and univariate analysis methods (generalized linear models). As predicted, we found high beta diversity of bryophytes along the soil gradient, and higher cover and richness in unproductive rocky serpentine grasslands than productive and exotic-dominated non-serpentine grasslands. Gopher burrowing had a unimodal influence on bryophyte alpha diversity. Our results show that bryophyte species composition and diversity respond strongly to the same soil gradient that controls vascular grassland species. Bryophytes are likely imperiled by the continued spread of exotic vascular plants, but promoted by moderate disturbances such as gopher burrowing.

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“…The lowland Weissia longifolia cluster (7.3), the upland Mnium stellare cluster (6.8), and the montane Encalypta alpina cluster (6.3) have the highest mean R values and all have ranges which clearly match the pattern of occurrence of calcareous substrates at appropriate altitudes. The tendency of mosses to occur on more calcareous substrates than liverworts has been shown in more detailed studies of epilithic bryophytes on treeless cliffs in the Czech Republic (Kubešová & Chytrý, 2005) and in 10 m 2 plots in eastern North America (Cleavitt et al, 2009). A single k510 moss cluster, Tortella flavovirens, has a predominantly coastal distribution and includes some halophytic species.…”

Section: Comparison Of Mosses and Liverwortsmentioning

confidence: 92%

A comparison of distribution patterns in British and Irish mosses and liverworts

Preston

Harrower

Hill³

2013

Journal of Bryology

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10.1179/1743282012Y.0000000045Contact CEH NORA team at noraceh@ceh.ac.ukThe NERC and CEH trademarks and logos ('the Trademarks') are registered trademarks of NERC in the UK and other countries, and may not be used without the prior written consent of the Trademark owner. We classified 747 species of British and Irish mosses into 10 clusters, based on their recorded distribution in 10 × 10 km grid squares (hectads). We generated the clusters in a two-stage process using the CLUSTASPEC program, by the same method as we had earlier used for British and Irish liverworts and hornworts. The clusters are named after the species with distributions which are most similar to those of the clusters as a whole. Clusters of widespread species (Bryum capillare), southern, lowland species (Rhynchostegium confertum), widespread calcifuges (Pleurozium schreberi), upland species (Blindia acuta) and montane calcifuges (Kiaeria falcata) closely match clusters recognised in the liverworts. The remaining clusters (Tortella flavovirens, Weissia longifolia, Mnium stellare, Encalypta alpina, Mnium lycopodioides) are less similar. The classification of mosses into 15 and 20 clusters generates additional clusters of hyperoceanic and montane mosses which also resemble liverwort clusters. The influence of calcareous bedrock has a more marked effect in determining moss distributions and, unlike the liverworts, the 10 moss clusters include one which is predominantly coastal. Mosses tend to be a less upland group than liverworts; a smaller proportion of their species have northern and western distributions and the lowland clusters are characterised by more extreme environmental conditions. As with the liverworts, geographically restricted clusters of species with predominantly Mediterranean-Atlantic, Arctic-montane and Boreo-arctic Montane world ranges include marked concentrations of threatened species, and species which are not recorded as fruiting in the British Isles. A comparison of distribution patterns in British and Irish mosses and liverwortsKeywords: Climate, Cluster analysis, Geology, Nested distributions, Phytogeography, ThreatCorrespondence to: C.D. Preston, Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire, OX10 8BB, UK. E-mail: cdpr@ceh.ac.uk. IntroductionThe delimitation of biogeographical regions (areas characterised by a similar biota) and biogeographical elements (groups of species with similar distributions) has long been a central aim of biogeography. Such studies have traditionally been carried out by the laborious accumulation, assessment and synthesis of evidence by individual experts and, although evidence-based, they have inevitably been essentially subjective. However, as Kreft & Jetz (2010) remark, "the recent availability of global species range maps, novel multivariate techniques and enhanced computational power now enable a quantitative scrutiny and extension of biogeographical regionalizations". This has led to a number of recent papers exploring such qu...

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Relationship of Bryophyte Occurrence to Rock Type in Upstate New York and Coastal Maine

Cited by 7 publications

References 18 publications

Drivers of distance‐decay in bryophyte assemblages at multiple spatial scales: Dispersal limitations or environmental control?

Drivers of distance‐decay in bryophyte assemblages at multiple spatial scales: Dispersal limitations or environmental control?

Bryophyte diversity in Californian grasslands in relation to substrate quality, exotic vascular plants and disturbance

A comparison of distribution patterns in British and Irish mosses and liverworts

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