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Nutrient availability in tropical caves influences the dynamics of microbial biomass.
MicrobiologyOpen ( IF 3.9 ) Pub Date : 2020-05-11 , DOI: 10.1002/mbo3.1044 Caio César Pires de Paula 1, 2 , Maria Elina Bichuette 1 , Mirna Helena Regali Seleghim 1
MicrobiologyOpen ( IF 3.9 ) Pub Date : 2020-05-11 , DOI: 10.1002/mbo3.1044 Caio César Pires de Paula 1, 2 , Maria Elina Bichuette 1 , Mirna Helena Regali Seleghim 1
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Few studies have evaluated the trophic level in tropical caves, and none related the microbial biomass dynamics in the immobilization of carbon and nitrogen. Here, four tropical caves of Terra Ronca State Park, Brazil, were studied: Angélica, São Bernardo, Terra Ronca I, and Terra Ronca II caves. Physical, chemical, and microbiological parameters (microbial biomass and respiration) were estimated in the dry and wet seasons. São Bernardo, Terra Ronca I, and Terra Ronca II caves presented higher nitrogen and microbial biomass nitrogen (MBN) values in the wet season than in the dry season. On the other hand, the Angélica cave showed larger amounts of nitrogen and lower MBN values in the dry season. These results indicate that caves can be adjusted in two ecological theories known as “stoichiometric decomposition” and “microbial nitrogen mining”—to the effects of nutrient availability on organic matter decomposition. The caves studied showed different environmental dynamics in relation to organic matter decomposition, which allows them to be considered unique and possess specific characteristics. Microbial biomass dynamics can be an important parameter to evaluate the availability of nutrients and ecological dynamics of the trophic network in subterranean environments.
中文翻译：
热带洞穴中的养分供应量会影响微生物生物量的动态。
很少有研究评估热带洞穴的营养水平，而且都没有涉及固定碳和氮的微生物生物量动态。在这里，研究了巴西Terra Ronca州立公园的四个热带洞穴：Angélica，SãoBernardo，Terra Ronca I和Terra Ronca II洞穴。在干燥和潮湿的季节估计物理，化学和微生物学参数（微生物生物量和呼吸）。圣贝尔纳多，Terra Ronca I和Terra Ronca II洞穴在雨季的氮和微生物生物量氮（MBN）值高于旱季。另一方面，在干旱季节，Angélica洞穴的氮含量较高，MBN值较低。这些结果表明，可以根据“化学计量分解”和“微生物氮开采”两种生态学理论对洞穴进行调整，以适应养分利用率对有机物分解的影响。所研究的洞穴显示出与有机物分解有关的不同环境动力学，这使它们被认为具有独特性并具有特定特征。微生物生物量动力学可以是评估地下环境中营养网络的养分可用性和营养网络生态动力学的重要参数。
更新日期：2020-05-11
中文翻译：
热带洞穴中的养分供应量会影响微生物生物量的动态。
很少有研究评估热带洞穴的营养水平，而且都没有涉及固定碳和氮的微生物生物量动态。在这里，研究了巴西Terra Ronca州立公园的四个热带洞穴：Angélica，SãoBernardo，Terra Ronca I和Terra Ronca II洞穴。在干燥和潮湿的季节估计物理，化学和微生物学参数（微生物生物量和呼吸）。圣贝尔纳多，Terra Ronca I和Terra Ronca II洞穴在雨季的氮和微生物生物量氮（MBN）值高于旱季。另一方面，在干旱季节，Angélica洞穴的氮含量较高，MBN值较低。这些结果表明，可以根据“化学计量分解”和“微生物氮开采”两种生态学理论对洞穴进行调整，以适应养分利用率对有机物分解的影响。所研究的洞穴显示出与有机物分解有关的不同环境动力学，这使它们被认为具有独特性并具有特定特征。微生物生物量动力学可以是评估地下环境中营养网络的养分可用性和营养网络生态动力学的重要参数。
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