Understanding the effect of stage-specific traits on species feeding habits can reveal how natural selection shapes life strategies. Amino acid (AA) nitrogen stable isotopes (δ15N) provide multiple proxies habitat baseline values and diet that improve our understanding strategies relative to their animal metabolism. We evaluated body length as a proxy for stage sex common dolphin Delphinus delp...

Abstract. The nitrogen-15 (15N) natural abundance composition (δ15N) in soils or plants is a useful tool to indicate the openness of ecosystem N cycling. This study aimed evaluate influence experimental warming on soil and plant δ15N. We applied global meta-analysis method synthesize 79 76 paired observations δ15N from 20 published studies, respectively. Results showed that mean effect sizes un...

Grass-based milk production is a major contributor to Irish agricultural output. The study characterized the pool using stable isotope ratio analysis of carbon, nitrogen, oxygen and sulphur. Authentic raw samples were collected from 50 farms on five occasions over 13 months. Mean values −27.11, 6.79, −3.27 6.16‰ obtained for δ13C, δ15N, δ18O δ34S, respectively. δ13C reflected high level grass i...

Ammonia (NH3) volatilized from cropland significantly impacts the ecological environment and human health. The identification quantification of atmospheric sources NH3 are therefore important for emission reduction air pollution control. Choosing appropriate nitrogen (N) fertilizer types is one key ways to reduce emissions agricultural systems due different N fertilizers with factors. natural a...

Snow nitrate is vulnerable to photolytic loss that causes isotopic alteration, and thus its isotopes can potentially track the extent of snow photolysis impacts in environments where significant. Large increases δ15N-NO3− below surface have been attributed this behavior generally consistent amongst theoretical as well lab field studies. Oxygen isotope ratios are thought be influenced by seconda...

Abiotic nitrogen reduction (ANR) in hydrothermal systems has been long considered as the most likely mechanism to transform N2, the dominant N species on the pre-life Earth’s surface, into NH4+, an essential compound for abiotic synthesis of large organic molecules facilitating the emergence of life in the early oceans [1]. Mineral-induced ANR process has been demonstrated by laboratory experim...