Controls of soil respiration in a salinity-affected ephemeral wetland

Drake, Paul L.; McCormick, Caroline; Smith, Michael J.

doi:10.1016/j.geoderma.2014.01.010

Cited by 12 publications

(10 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…During dry seasons or drought events, low soil moisture can directly inhibit soil microbial activity and root respiration (Yoon et al, 2014;Hu et al, 2016), thus increasing soil moisture during the transition from dry to wet soil conditions was accompanied by increasing soil respiration (Liu et al, 2014). Previous studies also found that at low SWC the aerobic soil respiration increased with increasing soil moisture in many wetlands, such as a salinity-affected ephemeral wetland (Drake et al, 2014), a lower coastal plain forested wetland (Miao et al, 2013), and high and low tidal flats (Hu et al, 2016).…”

Section: Seasonal Controls On Soil Respirationmentioning

confidence: 96%

“…3a-d). Soil respiration under different soil moisture conditions has been widely studied in a variety of ecosystems (Fissore et al, 2009;Drake et al, 2014;Hu et al, 2016). Soil moisture influences soil respiration directly through physiological processes of roots and microorganisms, and indirectly via diffusion of substrates and O 2 (Luo and Zhou, 2006).…”

Section: Seasonal Controls On Soil Respirationmentioning

confidence: 99%

“…Even at optimal soil temperatures, soil respiration was inhibited at high or low extremes of soil moisture across a wide range of terrestrial ecosystems (e.g. (Almagro et al, 2009;Bowling et al, 2011;Drake et al, 2014). In 2012 and 2015, soil respiration was negatively related to soil moisture (Fig.…”

Section: Seasonal Controls On Soil Respirationmentioning

confidence: 99%

See 2 more Smart Citations

Precipitation events reduce soil respiration in a coastal wetland based on four-year continuous field measurements

Han

Sun

Chu

et al. 2018

Agricultural and Forest Meteorology

View full text Add to dashboard Cite

Coastal wetlands are considered as a significant sink for global carbon because their organic-rich soils. Given exposed to shallow water tables, water from groundwater is transported upward to the root zone through capillary rise, thus soil moisture in coastal wetlands is relatively high even when there is no precipitation. We expected that as precipitation occurred, the soils in coastal wetlands might become quickly saturated and lead to the development of anoxic conditions. We further hypothesized that such anoxic conditions might decrease soil respiration by limiting oxygen availability and biological activities of roots and microorganisms. Based on continuous automated soil respiration data collected in a coastal wetland in the Yellow River Delta over 4 years (2012)(2013)(2014)(2015), the results showed that on the annual scale, cumulative soil respiration was 317, 321, 231, and 274 g C m −2 yr -1 for 2012, 2013, 2014, and 2015, respectively, with an average of 286 g C m −2 yr -1 . The rate of soil respiration increased exponentially with soil temperature during each year and its two seasons (growing season and non-growing season). In addition, soil respiration was significantly related to soil moisture during the growing season, but was not affected by soil moisture during the non-growing season. After each precipitation event, soil respiration was significantly negatively correlated with soil moisture under different initial soil water contents. There was a significant positive correlation between changes in soil respiration and changes in soil moisture following precipitation events. Moreover, the increase of soil moisture following precipitation events changed the temperature response of soil respiration. Our study indicated that precipitation events could decrease soil respiration by increasing soil moisture and inducing anoxic conditions in the coastal wetland. Therefore, we speculate that the continuation of decreasing precipitation and increasing temperature trends in the Yellow River Delta may increase soil carbon losses in the coastal wetland due to the increase in soil respiration.

show abstract

Section: Seasonal Controls On Soil Respirationmentioning

confidence: 96%

Section: Seasonal Controls On Soil Respirationmentioning

confidence: 99%

See 1 more Smart Citation

Precipitation events reduce soil respiration in a coastal wetland based on four-year continuous field measurements

Han

Sun

Chu

et al. 2018

Agricultural and Forest Meteorology

View full text Add to dashboard Cite

show abstract

“…The negative impact of soil salinity on habitat suitability, via impacts on osmotic potential, has been studied in the Dry Valleys [ Nielsen et al ., ; Poage et al ., ]. Additionally, the interactive influence of soil moisture and salinity on soil CO 2 flux has been identified in both the Dry Valleys [ Ball and Virginia , ] as well as a salinized wetland of Australia, where at high EC, SWC becomes increasingly important for metabolic processes [ Drake et al ., ]. Interestingly, flux was low in all wet locations inside the water track regardless of salinity level, suggesting that the low CO 2 fluxes may be the result of CO 2 remaining dissolved in water rather than via an impact of salinity and SWC on biological activity.…”

Section: Discussionmentioning

confidence: 95%

The role of water tracks in altering biotic and abiotic soil properties and processes in a polar desert in Antarctica

Ball

Levy

2015

JGR Biogeosciences

View full text Add to dashboard Cite

Groundwater discharge via water tracks is a largely unexplored passageway routing salts and moisture from high elevations to valley floors in the McMurdo Dry Valleys (MDV) of Antarctica. Given the influence that water tracks have on the distribution of liquid water in seasonally thawed Antarctic soils, it is surprising how little is known about their role in structuring biotic and abiotic processes this cold desert ecosystem. Particularly, it is unclear how soil biota will respond to the activation of new water tracks resulting from enhanced active layer thickening or enhanced regional snowmelt. In the MDV, water tracks are both wetter and more saline than the surrounding soils, constituting a change in soil habitat suitability for soil biology and therefore the ecological processes they carry out. To investigate the net impact that water tracks have on Dry Valley soil biology, and therefore the ecosystem processes for which they are responsible, we analyzed microbial biomass and activity in soils inside and outside of three water tracks and relate this to the physical soil characteristics. Overall, our results suggest that water tracks can significantly influence soil properties, which can further impact biological biovolume and both biotic and abiotic fluxes of CO 2 . However, the nature of its impact differs with water track, further suggesting that not all water tracks can be regarded the same.

show abstract

“…Jing et al [9] reported that halophytes decreased shallow soil salinity and increased organic matter content and microbial biodiversity. Changes in soil salinity may play a pivotal role in regulating the variation in soil respiration from coastal saline-alkali soil [10][11][12]. Determining how halophytic plants and soil salinity influence soil respiration are necessary steps in assessing potential impacts of environmental change.…”

mentioning

confidence: 99%

Soil Respiration from Different Halophytic Plants in Coastal Saline-Alkali Soils

Li¹,

Liu²

2020

Pol. J. Environ. Stud.

View full text Add to dashboard Cite

Soil salinity is a crucial constraint in the potential utilization of land resources in the coastal regions of northern China [1]. Most of the lands within these areas are covered with salinized soil and are accompanied by shallow underground water [2]. Excess salinity and alkalinity plagued seed germination and plant growth, and led to environmental degradation [3]. In order to improve these conditions, local governments have launched costal ecological restoration projects, including planting halophytes, to recover degraded vegetation and reduce soil salinization. Halophytic plants can grow well and produce high biomass in saline environments

show abstract

Controls of soil respiration in a salinity-affected ephemeral wetland

Cited by 12 publications

References 32 publications

Precipitation events reduce soil respiration in a coastal wetland based on four-year continuous field measurements

Precipitation events reduce soil respiration in a coastal wetland based on four-year continuous field measurements

The role of water tracks in altering biotic and abiotic soil properties and processes in a polar desert in Antarctica

Soil Respiration from Different Halophytic Plants in Coastal Saline-Alkali Soils

Contact Info

Product

Resources

About