Experimental Evaluation of Shading Effects in Seasonal Dynamics of Four Alpine Communities in Northwestern Caucasus, Russia

Onipchenko, V. G.; Blinnikov, Mikhail S.; Aksenova, A. A.

doi:10.1080/15230430.2001.12003437

Cited by 9 publications

(14 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, their ability to flower decreases significantly in more shaded conditions as a result of accompanying carbon deficiency caused by the shading. Snowbed plants, like all alpine plants, are more sensitive to shading during the first part of the growing season than the second (Onipchenko et al, 2001). Moreover, snowbed plants seem to have a particularly high resistance to low-temperature photo-inhibition, thus making them able to maintain carbon gain on days following frost and high sunlight exposure (Germino and Smith, 2000).…”

Section: The Environment and Species Adaptationsmentioning

confidence: 99%

“…Snowbed species that emerge through the snow, often in July, are subject to favorable environmental conditions as the soil and air have warmed up and are about to reach the yearly maximum temperature. At the same time, meltwater provides some protection against early drought (Mooney and Billings, 1960;Shimono and Kudo, 2003), and the daylight period is long (Onipchenko et al, 2001), accompanied by maximum CO 2 fixation (Tieszen, 1975). There is also a supply of nutrients from melting snow (Bowman, 1992;Woolgrove and Woodin, 1996b) and continued soil organic matter mineralization beneath the snowpack through the winter (Chapin et al, 1993;Brooks et al, 1996Brooks et al, , 1997, which are released with the melting snowpack.…”

Section: Plant Growth On Release From Snow Covermentioning

confidence: 99%

See 1 more Smart Citation

Effects of Simulated Environmental Changes on Growth and Growth Form in a Late Snowbed Population of Pohlia wahlenbergii (Web. et Mohr) Andr

Sandvik¹,

Heegaard²

2003

Arctic, Antarctic, and Alpine Research

View full text Add to dashboard Cite

Section: The Environment and Species Adaptationsmentioning

confidence: 99%

Section: Plant Growth On Release From Snow Covermentioning

confidence: 99%

Effects of Simulated Environmental Changes on Growth and Growth Form in a Late Snowbed Population of Pohlia wahlenbergii (Web. et Mohr) Andr

Sandvik¹,

Heegaard²

2003

Arctic, Antarctic, and Alpine Research

View full text Add to dashboard Cite

“…Several independent sources of evidence support our conclusion that this pattern is not merely caused by the physiological inability of snowbed species to grow in habitats which are snow-free early at high-temperature conditions. Firstly, these species have repeatedly been shown to respond positively to experimentally increased temperature (Arft et al 1999;Sandvik and Totland 2000;Onipchenko et al 2001). Secondly, they are physiologically able to grow on early snow-free sites (Heegaard 2002).…”

Section: Discussionmentioning

confidence: 97%

“…One explanation for the difference between these studies is the time scales studied. Onipchenko et al (2001) studied individual mature ramets, whereas our study focuses on the overall vegetation composition. Although adult individuals may be very persistent under a given competitive regime (e.g.…”

Section: Discussionmentioning

confidence: 99%

“…This suggests that the effects of climate change on local populations and communities cannot be explained solely by the physiological responses of individual species. The great variation in the magnitude of temperature responses among coexisting species has led to the hypothesis that, as increased temperatures seem to benefit some species more than others, another potential effect of climate change would be to change the outcome of competitive interactions (Choler et al 1991;Mooney 1991;Karivera et al 1993;Onipchenko et al 2001;Heegaard 2002;Pearson and Dawson 2003). As competitive displacement is slow in alpine climates, an experimental test of this hypothesis would require very long-term experiments.…”

Section: Introductionmentioning

confidence: 96%

See 1 more Smart Citation

Climate change affects the outcome of competitive interactions?an application of principal response curves

Heegaard

Vandvik

2004

Oecologia

View full text Add to dashboard Cite

It has been hypothesised that climate change may affect vegetation by changing the outcome of competitive interactions. We use a space-for-time approach to evaluate this hypothesis in the context of alpine time-of-snowmelt gradients. Principal response curves, a multivariate repeated-measurement analysis technique, are used to analyse for compositional differences in local ridge-to-snowbed gradients among 100 m altitudinal bands from 1,140 to 1,550 m a.s.l., corresponding to a temperature gradient of 2.5 degrees C (local lapse rate is 0.6 degrees C). The interaction between time-of-snowmelt and altitude is strongly significant statistically, indicating that the altitudinal gradient cannot be explained simply by the physiological responses of the species, but that there are also changes in the outcome of competitive interactions. At higher altitudes, there is a decrease in the time-of-snowmelt ranges of species which have intermediate times-of-snowmelt optima, whereas snowbed (chinophilous) species have wider time-of-snowmelt ranges. As snowbed species can survive, grow and reproduce at very early snow-free sites at high altitudes, the most likely explanation for their absence from all but the latest time-of-snowmelt habitats at lower altitudes is competitive exclusion by more vigorous lee-side species. This suggests that with future climate change snowbed species will experience, in addition to habitat fragmentation and reduced size of habitats due to increased temperature and snowmelt, an indirect effect due to competitive exclusion from late-snowmelt sites by species that have their optima outside snowbeds.

show abstract

Monitoring of vegetation in the coastal zone of Lake Vshivoe

Seliverstova,

Volkova

2023

E3S Web Conf.

View full text Add to dashboard Cite

The article presents the results of the current state of flora of the coastal zone of Vshivoe Lake. This is a natural drainless water body at the watershed of the Grachevka and Egorlyk rivers. The composition and structure of plant biodiversity were identified and GPS coordinates for rare and endangered plant species were established. In the course of expeditionary studies of the coastal zone 30 m wide, we observed the disappearance of the water mirror and the increase of steppe vegetation species, the appearance of trees, shrubs. Throughout the entire coastline in the association Phragmites australis + Typha latifolia with a dense projective coverage of 81 to 98% grows 125 species of higher vascular plants belonging to 37 families and 95 genera. The species composition of coastal-water vegetation in 2022, compared to 2014, has decreased by one species, the species composition has changed in favour of weeds, there is afforestation of the territory at the expense of shrubs, they become more to 3-5 pcs per 100 m². Anthropogenic and climatic factors led to an increase in the number of steppe species from 24 to 32 and ruderal species from 17 to 32 species in 2022 compared to 2014. Four species of sedges, Carex riparia, C. melanostachya, C. hordeistichos, C. vulpina, were found and determined from 8 previously discovered rare species of the Red Books of the Russian Federation and Stavropol Krai, were found and determined: Tulipa biebershteiniana, Bellevalia sarmatica, Iris halophila, Iris taurica, Paeonia tenuifolia, Adonis vernalis, Dactylorhiza incarnata, Anemone sylvestris, which is 6.78 % of the floristic composition of the area. It was established that the majority of rare and endangered species populations in natural habitats are growing with a predominance of vegetative and juvenile individuals.

show abstract

Experimental Evaluation of Shading Effects in Seasonal Dynamics of Four Alpine Communities in Northwestern Caucasus, Russia

Cited by 9 publications

References 25 publications

Effects of Simulated Environmental Changes on Growth and Growth Form in a Late Snowbed Population of Pohlia wahlenbergii (Web. et Mohr) Andr

Effects of Simulated Environmental Changes on Growth and Growth Form in a Late Snowbed Population of Pohlia wahlenbergii (Web. et Mohr) Andr

Climate change affects the outcome of competitive interactions?an application of principal response curves

Monitoring of vegetation in the coastal zone of Lake Vshivoe

Contact Info

Product

Resources

About