Climate Change Impacts on Soil Processes in Rangelands

Eldridge, David J.; Greene, Richard; Dean, Camin

doi:10.1007/978-3-642-20256-8_11

Cited by 6 publications

(2 citation statements)

References 76 publications

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“…On the other hand, elevated amounts of fine particles, resulting in higher water availability had a negative influence in hot climates (temperature class 3). This is in good accordance with the findings of Eldridge et al (2011) who reported that high temperatures combined with high humidity reduce the photosynthetic ability of the phycobiont, which limits the distribution of lichens.…”

Section: Discussionsupporting

confidence: 93%

Climatic and soil texture threshold values for cryptogamic cover development: a meta analysis

Fischer

Subbotina

2014

Biologia

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In a global meta study, which contained 157 biological soil crust (BSC) samples from all climatic regions worldwide, climatic and soil texture threshold values favoring BSC development were derived. Response variable was the "relative crust biomass", which was computed per literature source as the ratio between each individual crust biomass value of the given study to the study maximum value reported. Four crust types were distinguished: cyanobacterial, lichen, green algal and moss crusts. To quantify threshold conditions at which crust biomass responded to differences in texture and climate, we (I) determined correlations between bioclimatic variables, (II) calculated generalized linear models to determine the effect of typical climatic variables with soil clay content and with study site as a random effect. (III) Thresholds of climatic and texture effects were identified using a regression tree. Three mean annual temperature classes for texture dependent BSC growth limitation were identified: (1) <9• C with a threshold value of 25% silt and clay (limited growth on coarser soils), (2) 9-19• C, where texture did have no influence on relative crust biomass, and (3) >19• C at soils with <4 or >17% silt and clay. Non of the precipitation related bioclimatic variables did influence the relative crust biomass significantly. Because biocrust development is limited under certain climatic and soil texture conditions, it is suggested to consider soil texture in biogeochemical modeling of cryptogamic ground covers.

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Section: Discussionsupporting

confidence: 93%

Climatic and soil texture threshold values for cryptogamic cover development: a meta analysis

Fischer

Subbotina

2014

Biologia

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“…Compared with dry areas, the nutrient content of bare land in wet areas is higher, and the nutrient accumulation is not obvious even the presence of BSCs. In addition, studies have shown that the finer soil with higher water holding capacity promotes the growth of BSCs under colder climatic conditions, while the negative impact was found under hot climatic conditions [ 53 , 54 ]. The high temperature and high humidity environment will reduce the photosynthetic capacity of plants, thus inhibiting the distribution of crusts.…”

Section: Discussionmentioning

confidence: 99%

Responses of Soil C, N, P and Enzyme Activities to Biological Soil Crusts in China: A Meta-Analysis

Yang,

Yuan,

Guo

et al. 2024

Plants

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Biological soil crusts (BSCs) are often referred to as the “living skin” of arid regions worldwide. Yet, the combined impact of BSCs on soil carbon (C), nitrogen (N), phosphorus (P), and enzyme activities remains not fully understood. This study identified, screened and reviewed 71 out of 2856 literature sources to assess the responses of soil C, N, P and enzyme activity to BSCs through a meta-analysis. The results indicated that BSC presence significantly increased soil C, N, P and soil enzyme activity, and this increasing effect was significantly influenced by the types of BSCs. Results from the overall effect showed that soil organic carbon (SOC), total nitrogen (TN), available nitrogen (AN), total phosphorus (TP), and available phosphorus (AP) increased by 107.88%, 84.52%, 45.43%, 27.46%, and 54.71%, respectively, and four soil enzyme activities (Alkaline Phosphatase, Cellulase, Sucrase, and Urease) increased by 93.65–229.27%. The highest increases in SOC, TN and AN content occurred in the soil covered with lichen crusts and moss crusts, and significant increases in Alkaline Phosphatase and Cellulase were observed in the soil covered with moss crusts and mixed crusts, suggesting that moss crusts can synergistically enhance soil C and N pool and enzyme activity. Additionally, variations in soil C, N, P content, and enzyme activity were observed under different environmental settings, with more pronounced improvements seen in coarse and medium-textured soils compared to fine-textured soils, particularly at a depth of 5 cm from the soil surface. BSCs in desert ecosystems showed more significant increases in SOC, TN, AN, and Alkaline Phosphatase compared to forest and grassland ecosystems. Specifically, BSCs at low altitude (≤500 m) with an annual average rainfall of 0–400 mm and an annual average temperature ≤ 10 °C were the most conducive to improving soil C, N, and P levels. Our results highlight the role of BSCs and their type in increasing soil C, N, P and enzyme activities, with these effects significantly impacted by soil texture, ecosystem type, and climatic conditions. The implications of these findings are crucial for soil enhancement, ecosystem revitalization, windbreak, and sand stabilization efforts in the drylands of China.

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