Journal of Arid Environments latest issue
Journal of Arid Environments - ScienceDirect.com
1. Effects of tillage system on greenhouse gas fluxes and soil mineral nitrogen in wheat (Triticum aestivum, L.)-fallow during drought Original Research Article, Pages 103-113, Prakriti Bista, Urszula Norton, Rajan Ghimire, Jay B. Norton; Abstract
- Drought reduced WFPS by an average of 23%.
- First-year drought reduced soil CO2 fluxes but increased N2O fluxes.
- Second-year drought increased soil NO3 and reduced N2O fluxes to almost none.
- Soil under NT had the lowest CO2, N2O and the highest soil NO3 and water content.
- Soil under NT only remained a C sink in the second year.
2. Human-induced vegetation changes did not affect tree progeny performance in a seasonally dry forest of central Argentina, Original Research Article, Pages 125-132, Romina C. Torres, Daniel Renison, Abstract
- Progeny traits of trees located in forest and shrub-grass patches did not differ.
- Germination, seedling survival and growth varied among species.
- Most of the progeny traits did not differ among sites of seed collection.
3. Ecosystem effects of integrating human-made runoff-harvesting systems into natural dryland watersheds, Original Research Article OPEN ACCESS, Pages 133-143, Tarin Paz-Kagan, Noa Ohana-Levi, Moshe Shachak, Eli Zaady, Arnon Karnieli, Abstract
Runoff-harvesting systems (RHSs) design to collect runoff water and nutrients from small rocky watersheds into ponds bounded by soil dikes (termed limans) that are used as an afforestation grove. Our study aimed at quantifying the influence of RHSs using two indicators: soil quality (SQ) and aboveground net primary productivity (ANPP) in a small watershed scale. The SQ index was estimated by 13 physical, chemical, and biological soil properties. ANPP was evaluated by a spaceborne-derived vegetation index of total biomass (woody and annual) and field measurements of annuals. The study was conducted in four small RHS watersheds, as well as in a reference watershed without a liman, located in the Negev Desert, Israel. Our findings are: (1) there is a significantly higher soil organic matter, total water content, and phosphorus values in all the limans than in the other locations (upstream and downstream area); and (2) significantly higher SQ and total ANPP values in the limans than in the downstream areas, amplifying the overall watershed fertility and enhance ecosystem services. We conclude that integrating RHS as a fertility island, be adjusted their size and location, can be essential techniques to sustain ecosystem services and maintain the natural ecosystem in the watershed.