<i>Drepanocladus trifarius</i>– an example of unsuspected niche widths among mosses

Hedenäs, Lars; Bisang, Irene

doi:10.1111/j.1756-1051.2012.01526.x

Cited by 10 publications

(5 citation statements)

References 28 publications

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“…All three species have previously been reported from Arctic areas (Vanderpuye et al 2002, Hedenäs 2003, Hedenäs and Bisang 2012, but their geographical distribution is not determined. In the shallow parts of the lake (0-0.8 m), the coverage was estimated in 28 evenly distributed transects placed perpendicular to the lake shore.…”

Section: Distribution Of Moss Vegetationmentioning

confidence: 95%

Mosses in High-Arctic lakes: in situ measurements of annual primary production and decomposition

2015

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Aquatic mosses are important primary producers in High-Arctic lakes, but little information is available on their contribution to the overall production in these lakes. In order to predict effects of climate change on whole-lake ecosystem characteristics, more knowledge is needed on the role of moss in primary production, the extent of nutrient limitation of moss primary production and whether moss serves as food resource for secondary producers. In this study, we conducted an in situ growth experiment of an aquatic moss in a High-Arctic lake in NE Greenland and used these data to determine annual net production of this moss in the whole lake. We also measured tissue-N and tissue-P in order to assess nutrient limitation of moss production, measured in situ decomposition rates by litter bag experiments over 1 year and assessed the role of moss as food source by analysing stable isotope 15 N and 13 C of relevant organism groups in the lake. Net primary production of moss was 1.3 gC m -2 year -1 and constituted 23 % of the total benthic primary production and 18 % of the total lake primary production. Stoichiometric assessments suggested N and P limitation of moss growth. On average, 15 % of the standing biomass was decomposed per year. Our results also indicate that moss is not directly used as food resource by herbivores, but the most abundant herbivore, Lepidurus arcticus, is feeding on the epiphytic biofilm on the moss. Moss biomass is instead incorporated into the microbial decomposer pathway. All together, the study shows that moss plays an important ecological role as primary producer in High-Arctic lakes and functions as substrate for periphytic biofilm that serves as food resource for important herbivore invertebrates.

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Section: Distribution Of Moss Vegetationmentioning

confidence: 95%

Mosses in High-Arctic lakes: in situ measurements of annual primary production and decomposition

2015

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“…Montagnes, 1990), some may have quite broad tolerances for nutrient availability (e.g. Hadenäs and Bisang, 2012), and it is possible that their abundance at this time is an early indicator of the fen-bog transition (FBT). For instance, in a neo-ecological study, Kooijman (1992) reported the replacement of the rich fen species Scorpidium scorpoides by both C. cordifolium and Sphagnum species in Dutch fens, possibly explained by a succession from fen towards bog.…”

Section: Macrofossil Analysismentioning

confidence: 99%

A multi-proxy record of Holocene environmental change, peatland development and carbon accumulation from Staroselsky Moch peatland, Russia

et al. 2015

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Despite their huge extent, the peatlands of Russia are an under-exploited source of data on palaeoenvironmental change. We investigated the Holocene history of Staroselsky Moch, an ombrotrophic peatland in the Tver Region of European Russia by analysis of testate amoebae, peat physical properties, plant macrofossils and pollen. The peatland developed through a classic hydroseral succession in the early Holocene with a sharp decline in mineral input to 6200 cal. BC followed by an abrupt transition from fen to bog vegetation around 5500 cal. BC. Through the Holocene, the peatland has accumulated carbon at a mean apparent rate of 21.5 g C m−2 yr−1 suggesting that carbon accumulation rates in peatlands of European Russia lie close to the global average, and contrasting with a short sequence of eddy-covariance data which implies a net loss of carbon. The testate amoeba record shows considerable variability which may be driven by climate, but changes are not well replicated in the macrofossil or pollen data. We tentatively infer (1) a phase of early Holocene warming commencing around 7200 cal. BC, (2) dry peatland surface conditions c. 3700–3900 cal. BC, (3) a shift to wetter conditions from c. 3900 cal. BC, and (4) drier conditions from c. 400 cal. BC onwards. More robust and precise hydroclimatic reconstructions for this region will require the development of a regional transfer function and the replication of results between cores and sites.

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“…One member of this group ( Hamatocaulis vernicosus ) grows in conditions with large variation in water quality (Stechova et al, 2008). In Finland, the typical habitats are rich fens not especially rich in calcium (Ulvinen, 2009), and this probably holds true for the other members of the group as well (see Hedenäs and Bisang, 2012 for the wide ecological niche of Pseudocalliergon trifarium and Ruuhijärvi, 1962 for the ecology of Hamatocaulis lapponicus ). We thus find it unlikely that strict environmental requirements could explain their present scarcity (Söderström and Herben, 1997).…”

Section: Discussionmentioning

confidence: 99%

Rich-fen bryophytes in past and recent mire vegetation in a successional land uplift area

Rehell

Virtanen

2015

The Holocene

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Most rich-fen bryophyte species are currently declining and red listed in many European countries. Little is known about their past and current occurrence. We investigated past and recent bryophyte assemblages in mires in the land uplift coast of Finland. The study areas included primary succession areas where mire development started c. 6000 BP. In total, seven mires were studied in two successional transects along the land uplift coast. The past occurrences of rich-fen and other bryophytes were studied in 45 mire stratigraphic peat profiles, and recent occurrences were collected from 158 vegetation plots of 10 m × 10 m. Bryophyte subfossils indicated that the central parts of the basins developed first to wet rich fens with groundwater influence, which developed towards intermediate fens or poorer mire types. Most mire bryophytes occurred in about the same proportion in peat profiles as in recent vegetation. Five rich-fen species (Hamatocaulis lapponicus, H. vernicosus, Meesia longiseta, M. triquetra and Pseudocalliergon trifarium) were clearly more common in peat profiles than in the present mire vegetation, where these species were very rare and appeared only in small patches without sporophytes. These rich-fen species have had markedly wider distributions in the past, probably linked to climate fluctuations, whereas current occurrences are becoming scarce because of multiple anthropogenic factors such mire drainage and climate change.

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Drepanocladus trifarius– an example of unsuspected niche widths among mosses

Cited by 10 publications

References 28 publications

Mosses in High-Arctic lakes: in situ measurements of annual primary production and decomposition

Mosses in High-Arctic lakes: in situ measurements of annual primary production and decomposition

A multi-proxy record of Holocene environmental change, peatland development and carbon accumulation from Staroselsky Moch peatland, Russia

Rich-fen bryophytes in past and recent mire vegetation in a successional land uplift area

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