Golden Apple Snail Activity Alters Greenhouse Gas Emissions and Microbial Communities in Paddy Soil

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

🔬研究者:Provides empirical data on how an invasive species alters GHG fluxes and microbial communities, useful for modeling agricultural emissions and understanding ecological drivers.

🏢実務担当者:Limited direct application, but highlights the need to consider biological factors in managing agricultural emissions, potentially relevant for sustainable farming practices.

🏛政策担当者:May inform agricultural and environmental policies regarding invasive species management and GHG mitigation, though more research is needed for policy-level conclusions.

動物の活動は、土壌からのメタン（CH4）および亜酸化窒素（N2O）排出を調節する上で重要な役割を果たす。世界的な侵入性腹足類であるスクミリンゴガイ（GAS, Pomacea canaliculata）は、湿地に大きな個体群を確立しており、土壌の生態学的プロセスを撹乱してきた。しかし、GASの活動が温室効果ガス（GHG）排出に及ぼす影響は依然として不明である。低密度（GASL）、高密度（GASH）、および対照（CK、カタツムリなし）処理下でのCH4およびN2Oフラックス、土壌特性、微生物群集、ならびにGHG関連機能遺伝子を調べるために、25日間のメソコスム実験が実施された。結果は、GASLが25日目に土壌孔隙率と全窒素含有量をそれぞれ18.6%および7.6%有意に増加させることを示した。GASHは土壌ウレアーゼおよびスクラーゼ活性をそれぞれ18.1%および30.0%有意に増加させた。GASHは25日目にCH4排出フラックスを18.7%有意に減少させ、N2O排出フラックスを33.1%有意に増加させた。雌および雄のカタツムリからの25日間の累積CH4およびN2O排出量は、GASH処理における総CH4およびN2O排出量のそれぞれ0.002%および2.3%を占めた。さらに、GASは土壌微生物群集の組成を変化させた。GASLは、門レベルであるChloroflexotaの相対存在量を11.3%有意に減少させ、科レベルであるNitrospiraceaeの相対存在量を24.5%有意に増加させた。CKと比較して、GASHはmcrA、AOA-amoA、およびnosZの機能遺伝子の存在量をそれぞれ16.9%、19.7%、および21.1%減少させた一方で、pmoA、AOB-amoA、およびnirSの存在量をそれぞれ18.4%、65.3%、および54.2%増加させた。これらの知見は、GASが土壌の物理化学的特性および微生物学的特性を撹乱することを示しており、結論は短期間のメソコスム実験に限定される。

AI 翻訳（deepseek-v4-flash）。 正確を期す場合は下の原文を参照してください。

Animal activity plays an important role in regulating soil methane (CH4) and nitrous oxide (N2O) emissions. As a global invasive gastropod, golden apple snail (GAS, Pomacea canaliculata) has established great populations in wetlands, which has disturbed the soil ecological process. However, the impact of GAS activities on greenhouse gas (GHG) emissions is still unclear. A 25-day mesocosm experiment was conducted to examine CH4 and N2O fluxes, soil properties, microbial community, and GHG-related functional genes under low-density (GASL), high-density (GASH) and control (CK, without snail) treatments. Results showed that GASL significantly increased soil porosity and total nitrogen content by 18.6% and 7.6% on the 25th day. GASH significantly increased soil urease and sucrase activities by 18.1% and 30.0%. GASH significantly decreased the CH4 emission flux by 18.7% and increased the N2O emission flux by 33.1% on the 25th day. The 25-day cumulative CH4 and N2O emissions from female and male snail accounted for 0.002% and 2.3% of the total CH4 and N2O emissions in the GASH treatment, respectively. Moreover, GAS altered the soil microbial community composition. GASL significantly decreased the relative abundance of the phylum Chloroflexota by 11.3%, and increased the relative abundance of the family Nitrospiraceae by 24.5%. Compared with CK, GASH reduced the abundance of functional genes of mcrA, AOA-amoA, and nosZ by 16.9%, 19.7%, and 21.1%, respectively, while increasing the abundance of pmoA, AOB-amoA, and nirS by 18.4%, 65.3%, and 54.2%, respectively. These findings indicate that GAS disturbs soil physiochemical and microbial properties, and the conclusions are limited to a short-term mesocosm experiment.

• crossref https://doi.org/10.3390/agronomy16161525first seen 2026-08-10 05:30:40