Resource limitation and modeled microbial metabolism along an elevation gradient

CATENA ◽  
2022 ◽  
Vol 209 ◽  
pp. 105807
Author(s):  
Shuohong Zhang ◽  
Ying Pan ◽  
Zhenghu Zhou ◽  
Jian Deng ◽  
Fazhu Zhao ◽  
...  
Keyword(s):  
Elevation Gradient ◽  
Resource Limitation ◽  
Microbial Metabolism

scholarly journals Collective aggressiveness limits colony persistence in high but not low elevation sites in Amazonian social spiders

2019 ◽  
Author(s):  
James L. L. Lichtenstein ◽  
David N. Fisher ◽  
Brendan L. McEwen ◽  
Daniel T. Nondorf ◽  
Esteban Calvache ◽  
...  
Keyword(s):  
Social Evolution ◽  
Social Systems ◽  
Elevation Gradient ◽  
Resource Limitation ◽  
High Elevation ◽  
Group Survival ◽  
Colony Survival ◽  
A Site ◽  
High Elevations ◽  
The Relationship

AbstractIdentifying the traits that foster group survival in contrasting environments is important for understanding local adaptation in social systems. Here we evaluate the relationship between the aggressiveness of social spider colonies and their persistence along an elevation gradient using the Amazonian spider,Anelosimus eximius. We found that colonies ofA. eximiusexhibit repeatable differences in their collective aggressiveness, and that colony aggressiveness is linked with persistence in a site-specific manner. Less aggressive colonies are better able to persist at high-elevation sites, which lack colony-sustaining large-bodied prey, whereas colony aggression was not related to chance of persistence at low-elevation sites. This suggests resistance to resource limitation through docility promotes colony survival at high elevations. These data reveal that the collective phenotypes that relate to colony persistence vary by site, and thus, the path of social evolution in these environments is likely to be affected.

Microbial metabolism studies of Icariin derivatives

Planta Medica ◽  
2014 ◽  
Vol 80 (10) ◽  
Author(s):  
JH Kim ◽  
JH Ju ◽  
HM Kim ◽  
IS Lee
Keyword(s):  
Microbial Metabolism

Functional evenness of bird communities varies along the elevational gradient in Europe: Conservation implications

2019 ◽  
Author(s):  
Federico Morelli ◽  
Yanina
Keyword(s):  
Species Richness ◽  
Elevation Gradient ◽  
Bird Species ◽  
Elevational Gradient ◽  
Negative Association ◽  
Bird Communities ◽  
Breeding Bird ◽  
Bird Species Richness ◽  
Large Spatial Scale ◽  
Functional Evenness

ContextThe negative association between elevation and species richness is a well-recognized pattern in macro-ecology. ObjectivesThe aim of this study was to investigate changes in functional evenness of breeding bird communities along an elevation gradient in Europe. MethodsUsing the bird data from the EBCC Atlas of European Breeding Birds we estimated an index of functional evenness which can be assumed as a measure of the potential resilience of communities.ResultsOur findings confirm the existence of a negative association between elevation and bird species richness in all European eco regions. However, we also explored a novel aspect of this relationship, important for conservation: Our findings provide evidence at large spatial scale of a negative association between the functional evenness (potential community resilience) and elevation, independent of the eco region. We also found that the Natura2000 protected areas covers the territory most in need of protection, those characterized by bird communities with low potential resilience, in hilly and mountainous areas.ConclusionsThese results draw attention to European areas occupied by bird communities characterized by a potential lower capacity to respond to strong ecological changes, and, therefore, potentially more exposed to risks for conservation.

scholarly journals Altitudinal gradient affect abundance, diversity and metabolic footprint of soil nematodes in Banihal-Pass of Pir-Panjal mountain range

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Shahid Afzal ◽  
Humira Nesar ◽  
Zarrin Imran ◽  
Wasim Ahmad
Keyword(s):  
Elevation Gradient ◽  
Carbon Assimilation ◽  
Shannon Index ◽  
Nematode Community ◽  
Mountain Range ◽  
Soil Nematode ◽  
Nematode Communities ◽  
Nematode Abundance ◽  
Belowground Carbon ◽  
Abundance And Diversity

AbstractDespite enormous diversity, abundance and their role in ecosystem processes, little is known about how community structures of soil-inhabiting nematodes differ across elevation gradient. For this, soil nematode communities were investigated along an elevation gradient of 1000–2500 masl across a temperate vegetation in Banihal-Pass of Pir-Panjal mountain range. We aimed to determine how the elevation gradient affect the nematode community structure, diversity and contribution to belowground carbon assimilation in the form of metabolic footprint. Our results showed that total nematode abundance and the abundance of different trophic groups (fungivores, herbivores and omnivores) declined with the increase of elevation. Shannon index, generic richness and evenness index indicated that nematode communities were more diverse at lower elevations and declined significantly with increase in elevation. Nematode community showed a pattern of decline in overall metabolic footprint with the increase of elevation. Nematode abundance and diversity proved to be more sensitive to elevation induced changes as more abundant and diverse nematode assemblage are supported at lower elevations. Overall it appears nematode abundance, diversity and contribution to belowground carbon cycling is stronger at lower elevations and gradually keep declining towards higher elevations under temperate vegetation cover in Banihal-pass of Pir-Panjal mountain range.

scholarly journals Controls on Streamflow Densities in Semiarid Rocky Mountain Catchments

Water ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 521
Author(s):  
Caroline Martin ◽  
Stephanie K. Kampf ◽  
John C. Hammond ◽  
Codie Wilson ◽  
Suzanne P. Anderson
Keyword(s):  
Elevation Gradient ◽  
Rocky Mountain ◽  
Surface Flow ◽  
Colorado Front Range ◽  
Front Range ◽  
Channel Network ◽  
Stream Discharge ◽  
Geologic Maps ◽  
National Hydrography Dataset ◽  
Active Flow

Developing accurate stream maps requires both an improved understanding of the drivers of streamflow spatial patterns and field verification. This study examined streamflow locations in three semiarid catchments across an elevation gradient in the Colorado Front Range, USA. The locations of surface flow throughout each channel network were mapped in the field and used to compute active drainage densities. Field surveys of active flow were compared to National Hydrography Dataset High Resolution (NHD HR) flowlines, digital topographic data, and geologic maps. The length of active flow declined with stream discharge in each of the catchments, with the greatest decline in the driest catchment. Of the tributaries that did not dry completely, 60% had stable flow heads and the remaining tributaries had flow heads that moved downstream with drying. The flow heads were initiated at mean contributing areas of 0.1 km2 at the lowest elevation catchment and 0.5 km2 at the highest elevation catchment, leading to active drainage densities that declined with elevation and snow persistence. The field mapped drainage densities were less than half the drainage densities that were represented using NHD HR. Geologic structures influenced the flow locations, with multiple flow heads initiated along faults and some tributaries following either fault lines or lithologic contacts.

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