Matches in SemOpenAlex for { <https://semopenalex.org/work/W2267570391> ?p ?o ?g. }
- W2267570391 abstract "Grazing by reindeer (Rangifer tarandus L.) affects vegetation and soil microbial processes in tundra ecosystems. It is considered that grazing can induce two alternative vegetation states that differ in plant species composition and the rate of nutrient cycling. I hypothesised that these alternative vegetation states differ in ecosystem responses to climate warming. I tested the hypothesis using a factorial warming and fertilisation experiment on long-term lightly grazed (LG) and heavily grazed (HG) tundra. The reindeer grazing induced vegetation shift from dwarf shrubs to graminoids increased microbial activities for SOM decomposition. The grazer-induced shifts in vegetation and microbial activities in combination with the fertilisation via urine and faeces had important consequences on soil N availability and soil C quality that determined the ecosystem-level consequences of climate warming. Due to higher soil N availability, warming increased plant productivity (GEP) on HG but not on LG tundra, where N limitation prevented the warmingincreased plant production. The varying effects of warming on GEP at different grazing intensities determined the effects of warming on ecosystem net C sink, which was unaffected by warming on HG but decreased on LG tundra. Reindeer grazing reduced the soil C quality, as soils under LG stored a higher proportion of carbohydrates vulnerable to microbial decomposition than soils under HG. According to laboratory soil incubations, the grazer-induced reduction in soil C quality mitigated the responses of soil microbial activity to prolonged warming. Warming caused a stronger decrease in concentrations of phenolics, an important means of plant defence against biotic and abiotic stresses, in Empetrum nigrum ssp. hermaphroditum under HG than LG. Grazing history by reindeer, with the associated vegetation shift from dwarf shrubs to graminoids, can significantly alter the ecosystem-level consequences of climate warming. Overall, this thesis highlights that the effects of reindeer grazing on soil properties, soil N availability and C quality, are important determinants of the ecosystem responses to climate warming. Therefore, future research on climate warming should take into account herbivores and aim towards a more holistic approach that includes both aboveground and belowground components of the ecosystem." @default.
- W2267570391 created "2016-06-24" @default.
- W2267570391 creator A5011091749 @default.
- W2267570391 date "2014-12-11" @default.
- W2267570391 modified "2023-09-25" @default.
- W2267570391 title "Ecosystem-level consequences of climate warming in tundra under differing grazing pressures by reindeer" @default.
- W2267570391 cites W1956280464 @default.
- W2267570391 cites W1963787911 @default.
- W2267570391 cites W1964249839 @default.
- W2267570391 cites W1969069662 @default.
- W2267570391 cites W1970076264 @default.
- W2267570391 cites W1970987808 @default.
- W2267570391 cites W1972619837 @default.
- W2267570391 cites W1973332823 @default.
- W2267570391 cites W1974010259 @default.
- W2267570391 cites W1977308431 @default.
- W2267570391 cites W1980757675 @default.
- W2267570391 cites W1981542354 @default.
- W2267570391 cites W1981711352 @default.
- W2267570391 cites W1981823157 @default.
- W2267570391 cites W1982648558 @default.
- W2267570391 cites W1986117536 @default.
- W2267570391 cites W1987960827 @default.
- W2267570391 cites W1990151103 @default.
- W2267570391 cites W1991001831 @default.
- W2267570391 cites W1993698776 @default.
- W2267570391 cites W1999453883 @default.
- W2267570391 cites W2003236376 @default.
- W2267570391 cites W2004824256 @default.
- W2267570391 cites W2004827430 @default.
- W2267570391 cites W2005447989 @default.
- W2267570391 cites W2006197704 @default.
- W2267570391 cites W2015783848 @default.
- W2267570391 cites W2021178632 @default.
- W2267570391 cites W2024272420 @default.
- W2267570391 cites W2024279012 @default.
- W2267570391 cites W2027077582 @default.
- W2267570391 cites W2029709627 @default.
- W2267570391 cites W2030051431 @default.
- W2267570391 cites W2030796885 @default.
- W2267570391 cites W2031808375 @default.
- W2267570391 cites W2032460070 @default.
- W2267570391 cites W2036456777 @default.
- W2267570391 cites W2037590760 @default.
- W2267570391 cites W2037767426 @default.
- W2267570391 cites W2039412861 @default.
- W2267570391 cites W2041842029 @default.
- W2267570391 cites W2041951165 @default.
- W2267570391 cites W2042200524 @default.
- W2267570391 cites W2044554891 @default.
- W2267570391 cites W2049944381 @default.
- W2267570391 cites W2051415456 @default.
- W2267570391 cites W2053549162 @default.
- W2267570391 cites W2054265689 @default.
- W2267570391 cites W2057008966 @default.
- W2267570391 cites W2057994028 @default.
- W2267570391 cites W2059317859 @default.
- W2267570391 cites W2060474549 @default.
- W2267570391 cites W2061195009 @default.
- W2267570391 cites W2063165095 @default.
- W2267570391 cites W2066451700 @default.
- W2267570391 cites W2068693676 @default.
- W2267570391 cites W2068965346 @default.
- W2267570391 cites W2069084892 @default.
- W2267570391 cites W2069962760 @default.
- W2267570391 cites W2070145679 @default.
- W2267570391 cites W2072483824 @default.
- W2267570391 cites W2073647668 @default.
- W2267570391 cites W2075962237 @default.
- W2267570391 cites W2079726181 @default.
- W2267570391 cites W2080911445 @default.
- W2267570391 cites W2083857556 @default.
- W2267570391 cites W2084360544 @default.
- W2267570391 cites W2084640360 @default.
- W2267570391 cites W2087319810 @default.
- W2267570391 cites W2091472760 @default.
- W2267570391 cites W2091707842 @default.
- W2267570391 cites W2092525110 @default.
- W2267570391 cites W2095567930 @default.
- W2267570391 cites W2097295829 @default.
- W2267570391 cites W2100636547 @default.
- W2267570391 cites W2103036991 @default.
- W2267570391 cites W2103112927 @default.
- W2267570391 cites W2103346195 @default.
- W2267570391 cites W2105989018 @default.
- W2267570391 cites W2106446186 @default.
- W2267570391 cites W2108220075 @default.
- W2267570391 cites W2109895772 @default.
- W2267570391 cites W2109937711 @default.
- W2267570391 cites W2109965041 @default.
- W2267570391 cites W2112576747 @default.
- W2267570391 cites W2112828989 @default.
- W2267570391 cites W2113345563 @default.
- W2267570391 cites W2117600559 @default.
- W2267570391 cites W2119035159 @default.
- W2267570391 cites W2120934611 @default.
- W2267570391 cites W2122187071 @default.
- W2267570391 cites W2127536414 @default.
- W2267570391 cites W2128149255 @default.
- W2267570391 cites W2130969589 @default.