筛选
科学数据
统计数据
共检索到14条 ,权限内显示50条;
Data from: Disentangling effects of air and soil temperature on C allocation in cold environments: a 14C pulse labelling study with two plant species
- 负责人：
- DOI：
- doi:10.5061/dryad.mk1vd47
- 摘要：
- and independently to roots, and plants pulse-labelled with 14CO2. We traced soil CO2 and 14CO2 evolution for four days, after which microcosms were destructively
Data from: Soil organic carbon stability in forests: distinct effects of tree species identity and traits
- 负责人：
- DOI：
- doi:10.5061/dryad.7v87nf5
- 摘要：
- ?occluded particulate organic matter (POM) and mineral?associated SOM, and bulk SOM ?15N and ?14C. The stability of SOM varied substantially amo
Data from: Accumulation rates and sources of external nitrogen in decaying wood in a Norway spruce dominated forest
- 负责人：
- DOI：
- doi:10.5061/dryad.4ts50
- 摘要：
- ?15N, N%, 14C-dating, fungal composition and N2 fixation rate. For N2 fixation rate, we also determined its dependency on ambient temperature
Data from: Testosterone in ancient hair from an extinct species
- 负责人：
- DOI：
- doi:10.5061/dryad.q951rb9
- 摘要：
- . Hair shafts have been previously used to sequence DNA from >50,000 14C years old Siberian woolly mammoths (Mammuthus primigenius). Hair-testing has als
SGS-LTER Long-term Seasonal Root Biomass on the Central Plains Experimental Range, Nunn, Colorado, USA 1985-2007, ARS Study Number 3
- 负责人：
- Colorado State University. Libraries;;Colorado State University. Libraries
- DOI：
- doi:10.25675/10217/85665
- 摘要：
- Root Biomass, were obtained in section 21 of the Central Plains Experimental Range from 1985-2008 in conjunction with a 14C labeling experiment designed to test
Data from: Holocene increases in palm abundances in northwestern Amazonia
- 负责人：
- DOI：
- doi:10.5061/dryad.2442n52
- 摘要：
- Taxon: Amazonian palms Methods: We performed charcoal and phytolith analysis on soil cores, and obtained ages of past fires using 14C dating. We measured
Data from: Primary production calculations for sea ice from bio-optical observations in the Baltic Sea
- 负责人：
- DOI：
- doi:10.5061/dryad.7k1gf
- 摘要：
- s and photoadaptation of photosynthesis were determined from 14C-incorporation in photosynthetic-irradiance experiments using melted ice. The quantum yields were applied
Data from: From pristine forests to high-altitude pastures: an ecological approach to prehistoric human impact on vegetation and landscapes in the western Italian Alps
- 负责人：
- DOI：
- doi:10.5061/dryad.3jm3s
- 摘要：
- intervals of cumulative probability density of 14C ages from nearby archaeological sites, suggesting that human activity was the factor leading to massive
Data from: Microform-scale variations in peatland permeability and their ecohydrological implications
- 负责人：
- 关键词：
- acrotelm-catotelm model;microform;peatland;raised bog;permeability;persistence;ecological memory
- DOI：
- doi:10.5061/dryad.v5r86
- 摘要：
- of characteristic peatland microform – ridges and hollows – at a raised bog in Wales. Six 14C dates were also collected for one hollow and an adjacent ridge
Data from: Archaeopedological analysis of colluvial deposits in favourable and unfavourable areas: reconstruction of land use dynamics in SW Germany
- 负责人：
- DOI：
- doi:10.5061/dryad.rh67h
- 摘要：
- Colluvial deposits, as the correlate sediments of human induced soil erosion, depict an excellent archive of land use and landscape history as representatives of human-environment interactions. This study establishes a chronostratigraphy of colluvial deposits and reconstructs past land use dynamics in the Swabian Jura, the Baar and the Black Forest in SW Germany. In the agriculturally favourable Baar area multiple main phases of colluvial deposition, and thus intensified land use, can be identified from the Neolithic to the Modern Times. In the unfavourable Swabian Jura increased colluvial deposition began later compared to the more favourable areas in the Baar. The same holds true for the unfavourable areas of the Black Forest, but intensified land use can only be reconstructed for the Middle Ages and Early Modern times instead of for the Bronze and Iron Age as in the Swabian Jura. Land use intensity and settlement dynamics represented by thick, multi-layered colluvial deposits increase in the Baar and the Black Forest during the Middle Ages. In-between those phases of geomorphodynamic activity and colluviation, stable phases occur, interpreted as phases with sustainable land use or without human presence.
