Growth Rate and Temperature Responses in Bryophytes: II. A Comparative Study of Species of Contrasted Ecology

Furness, S. B.; Grime, J. Philip

doi:10.2307/2259920

Cited by 120 publications

(64 citation statements)

References 29 publications

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“…Day length, temperature (Duckett and Renzaglia, 1993;Hohe et al, 2002), air humidity, and precipitation (Laaka-Lindberg, 2005) were proven to influence the initiation of sex organs or sporophyte maturation in bryophytes. Likewise, vegetative growth can be influenced by day length and temperature (Furness and Grime, 1982;Schwabe and Nachmony-Bascomb, 1963). Gemmae of Lophozia species are produced by mitotic cell-division on edges of young top leaves (Buch, 1911); hence both gemma production Fig.…”

Section: Discussionmentioning

confidence: 99%

Comparison of gemma production among three Lophozia species during the growing season

Holá

Kučera

Těšitel

2011

Flora - Morphology, Distribution, Functional Ecology of Plants

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Section: Discussionmentioning

confidence: 99%

Comparison of gemma production among three Lophozia species during the growing season

Holá

Kučera

Těšitel

2011

Flora - Morphology, Distribution, Functional Ecology of Plants

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“…However, he did not distinguish any additional response to any possible increase in nutrients in the water supply from canopy leachates. Furness & Grime (1982) report a temperature optimum for relative growth rate of a British population of H. splendens in well-watered shoots in laboratory studies to be between 20 and 25 °C. Despite the fact that the 1994 season was exceptionally warm (during the two month study period 30 "o of mean midday temperatures during July and August were over 15 °C, and 15*^(1 of mean midday temperatures were above 18 °C (data from Abisko Meteorological Station)), the increased temperature treatment v^' as found to decrease dry matter accumulation of individual shoots and also shoot lengtb of the C segment.…”

Section: Hylocomium Splendensmentioning

confidence: 97%

Growth responses of Polytrichum commune and Hylocomium splendens to simulated environmental change in the sub‐arctic

et al. 1995

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SliMMARYTotal moss cover and the gro-\\th responses of the t-wo dominant bryophytes vi-ithin a sub-arctic heath ecosystem, Polytrichum commune Hedw. and Hylocomium splendens (Hedw.) Br. Eur., were investigated in response to simulated environmental change. Temperature, water supply and nutrients (NPK fertilizer) were increased in a factorial field study in Swedish Lapland, After 3 yr of treatment, total moss cover on fertilized plots was found to be less than 50 ",, of that on unfertilized plots, H. splendens made a smaller contribution to total cover, and also had fewer shoots on the fertilizer treated plots. The relative contribution of P. commune to the bryophyte community was greater on the fertilized plots, although total shoot numbers of P. commune were not greater. There was. however, a larger number of dead shoots of P. commune on the fertilized plots. Total moss cover, relative contribution to moss cover by P. commune and H. splendens, and the numbers of shoots of these two species, were unresponsive to both the temperature and water treatments. The growth of the current year's segment of H. splendens w-as retarded hy both the fertilizer and temperature treatments. Furthermore, the dry weight of the physiologically acti\-e shoot was found to be significantly altered by all three treatments. The current year's growth of P. commune showed increases in d, wt and morphological parameters in response to the fertilizer treatment. There were also interactive effects of both the fertilizer and temperature treatments with the water treatment on the current year's stem length increment.

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“…As such, these effects are often incorporated into soil-vegetation-atmosphere transfer models that upscale arctic leaf-scale fluxes to the footprint of an eddy covariance tower and to larger scales (Williams and Rastetter, 1999), though not always (Shaver et al, 2007). However, photosynthetic deactivation driven by higher temperature is often not considered important on seasonal timescales due to tundra mosses' relatively high optimal temperatures and ability to adapt quickly (Furness and Grime, 1982;Oechel, 1976;Riutta et al, 2007;Sveinbjörnsson and Oechel, 1983;Zona et al, 2011). Similarly, the tussock tundra species Eriophorum vaginatum has been found to have only a minimal physiological response to temperature (Tissue and Oechel, 1987).…”

Section: B R K Runkle Et Al: Partitioning Tundra Nee Fluxesmentioning

confidence: 99%

Bulk partitioning the growing season net ecosystem exchange of CO<sub>2</sub> in Siberian tundra reveals the seasonality of its carbon sequestration strength

et al. 2013

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Abstract. This paper evaluates the relative contribution of light and temperature on net ecosystem CO2 uptake during the 2006 growing season in a polygonal tundra ecosystem in the Lena River Delta in Northern Siberia (72°22´ N, 126°30´ E). The occurrence and frequency of warm periods may be an important determinant of the magnitude of the ecosystem's carbon sink function, as they drive temperature-induced changes in respiration. Hot spells during the early portion of the growing season, when the photosynthetic apparatus of vascular plants is not fully developed, are shown to be more influential in creating positive mid-day surface-to-atmosphere net ecosystem CO2 exchange fluxes than those occurring later in the season. In this work we also develop and present a multi-step bulk flux partition model to better account for tundra plant physiology and the specific light conditions of the arctic region. These conditions preclude the successful use of traditional partition methods that derive a respiration–temperature relationship from all nighttime data or from other bulk approaches that are insensitive to temperature or light stress. Nighttime growing season measurements are rare during the arctic summer, however, so the new method allows for temporal variation in the parameters describing both ecosystem respiration and gross uptake by fitting both processes at the same time. Much of the apparent temperature sensitivity of respiration seen in the traditional partition method is revealed in the new method to reflect seasonal changes in basal respiration rates. Understanding and quantifying the flux partition is an essential precursor to describing links between assimilation and respiration at different timescales, as it allows a more confident evaluation of measured net exchange over a broader range of environmental conditions. The growing season CO2 sink estimated by this study is similar to those reported previously for this site, and is substantial enough to withstand the long, low-level respiratory CO2 release during the rest of the year to maintain the site's CO2 sink function on an annual basis.

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Growth Rate and Temperature Responses in Bryophytes: II. A Comparative Study of Species of Contrasted Ecology

Cited by 120 publications

References 29 publications

Comparison of gemma production among three Lophozia species during the growing season

Comparison of gemma production among three Lophozia species during the growing season

Growth responses of Polytrichum commune and Hylocomium splendens to simulated environmental change in the sub‐arctic

Bulk partitioning the growing season net ecosystem exchange of CO<sub>2</sub> in Siberian tundra reveals the seasonality of its carbon sequestration strength

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Growth Rate and Temperature Responses in Bryophytes: II. A Comparative Study of Species of Contrasted Ecology

Cited by 120 publications

References 29 publications

Comparison of gemma production among three Lophozia species during the growing season

Comparison of gemma production among three Lophozia species during the growing season

Growth responses of Polytrichum commune and Hylocomium splendens to simulated environmental change in the sub‐arctic

Bulk partitioning the growing season net ecosystem exchange of CO&lt;sub&gt;2&lt;/sub&gt; in Siberian tundra reveals the seasonality of its carbon sequestration strength

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Bulk partitioning the growing season net ecosystem exchange of CO<sub>2</sub> in Siberian tundra reveals the seasonality of its carbon sequestration strength