Canopy soil greenhouse gas dynamics in response to indirect fertilization across an elevation gradient of tropical montane forests

Matson, Amanda; Corre, Marife D.; Veldkamp, Edzo

doi:10.1111/btp.12413

Cited by 5 publications

(2 citation statements)

References 56 publications

(129 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Because water and many nutrient elements are dominated by gaseous cycles and are deposited onto forest ecosystems from above, epiphytes that grow at upper positions on a tree have a higher priority to receive and use incoming water and nutrients than those in lower positions. Thus, nutrient availabilities could be different among epiphytes inhabiting different positions in a forest canopy (Matson, Corre, & Veldkamp, ; Wania, Hietz, & Wanek, ). Epiphytes growing under other epiphytes may experience greater water and nutrient stresses than those growing above other epiphytes; however, there could be important exceptions to this generalization.…”

Section: Introductionmentioning

confidence: 99%

Mediation of stemflow water and nutrient availabilities by epiphytes growing above other epiphytes in a subtropical forest

et al. 2019

View full text Add to dashboard Cite

Stemflow is the most importance source of water and nutrients to epiphytes growing on tree stems that lack access to canopy soils. Many host trees are inhabited by a large number of epiphyte species, often growing in close proximity. The nutrient and water relationships among such co‐occurring epiphytes are largely unknown. We examined stemflow quality and quantity before and after passing through a substrate‐forming epiphyte, Asplenium nidus, and two nonsubstrate‐forming epiphytes, Haplopteris flexuosa and Liparis nakaharai, in a subtropical rainforest in Taiwan. The results indicate that stemflow quantity decreased after passing through these epiphytes. The magnitude of decreases was large for H. flexuosa (63%) and L. nakaharai (74%) but minor for A. nidus (5.6%), possibly because the vertical leaves of the latter collected throughfall, compensating for the water they retained. There was an overall decrease in stemflow ion concentrations after passing through A. nidus, likely due to greater retention than leaching of ions, but an overall increase after passing through L. nakaharai and H. flexuosa, possibly the result of greater leaching than retention. Our results indicate that epiphytes growing under A. nidus received more stemflow with few nutrients and those growing under the two nonsubstrate‐forming epiphytes received less stemflow but with more nutrients. Currently, the growth of epiphytes is limited by water at the study site, so that Asplenium provides favourable microhabitat for epiphytes growing below. If climate change lead to drier conditions, substrate‐forming epiphytes could become oases in the forest canopy desert and attract more epiphytes to grow underneath.

show abstract

Section: Introductionmentioning

confidence: 99%

Mediation of stemflow water and nutrient availabilities by epiphytes growing above other epiphytes in a subtropical forest

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Such an increase suggests that sufficient P may have reached the mineral soil, where methanotrophic activity is most active (Wolf et al., 2012), alleviating P limitation on methanotrophs and resulting in increased CH 4 uptake (Table 1; Figure 1b). In a study of canopy soil CH 4 fluxes conducted at the same plots, P addition to the forest floor leads to increase in CH 4 uptake in canopy soils, suggesting P‐limited CH 4 oxidation (Matson, Corre, & Veldkamp, 2017). Enhanced soil CH 4 uptake by addition of P was also observed in a subtropical forest soil; however, the mechanism used to explain their observations was increased plant water uptake, which, in turn, reduced soil moisture and increased CH 4 diffusivity from the atmosphere into the soil (T. Zhang et al., 2011).…”

Section: Discussionmentioning

confidence: 99%

Nitrogen and Phosphorus Control Soil Methane Uptake in Tropical Montane Forests

et al. 2021

Self Cite

View full text Add to dashboard Cite

Atmospheric concentrations of methane (CH 4 ), an important greenhouse gas, have more than doubled since pre-industrial times (Denman et al., 2007) and continue to increase at present (Turner et al., 2017(Turner et al., , 2019. About 75% of global CH 4 production, which is in total about 600 Tg yr −1 , is produced by microbial methanogenic sources, primarily in wetland soils (Conrad, 1989). In contrast, the only global biogenic sink is CH 4 uptake in aerobic soils by CH 4 -oxidizing bacteria, which perform an important ecosystem service by contributing about 5% to the total global CH 4 sink strength (Reeburgh, 2003). However, there are indications that this CH 4 sink is declining (Ni & Groffman, 2018).Tropical ecosystems play an important role in the global CH 4 budget both in terms of production, with inundated wetlands contributing about 50% to global CH 4 production (Bloom et al., 2010;Z. Zhang et al., 2017), and uptake, with tropical forest soils contributing about one third to global annual CH 4 uptake by soils (Dutaur & Verchot, 2007;Zhao et al., 2019). However, studies that compare satellite observations of CH 4 concentrations with inventories of known CH 4 sources and sinks using bottom-up modeling reveal that there are unexplained large discrepancies between modeled and observed atmospheric CH 4 concentrations in the tropics (Riley et al., 2012). This illustrates that the location and strength of CH 4 sources and sinks in the tropics are poorly constrained (Bergamaschi et al., 2009;Bloom et al., 2010;Pangala et al., 2017). Improving our understanding of the factors that control the exchange of CH 4 in tropical soils is thus a critical step toward a better-constrained CH 4 budget for tropical ecosystems.

show abstract