Measuring the ecological significance of microscale nutrient patches
نویسنده
چکیده
parative rapid ammonium uptake by four species of marine phytoplankton. Limnol. Oceanogr. 27: 814-827. -, J. J. MCCARTHY, AND D. G. PEAVEY. 1979. Growth rate influence on the chemical composition of phytoplankton in oceanic waters. Nature 279: 210-215. HEALEY, F. P. 1980. Slope of the Monod equation as an indicator of advantage in nutrient competition. Microb. Ecol. 5: 281-286. HUTCHINSON, G. E. 1967. A treatise on limnology, v. 2. Wiley. JACKSON, G. A. 1980. Phytoplankton growth and zooplankton grazing in oligotrophic oceans. Nature 284: 439-44 1. JOHANNES, R. E. 1964. Uptake and release of dissolved organic phosphorus by representatives of a coastal marine ecosystem. Limnol. Oceanogr. 9: 224-234. LEHMAN, J. T. 1976. Ecological and nutritional studies on Dinobryon Ehrenb.: Seasonal periodicity and the phosphate toxicity problem. Limnol. Oceanogr. 21: 646-658. -. 1980. Release and cycling of nutrients between planktonic algae and herbivores. Limnol. Oceanogr. 25: 620-632. AND D. SCAVIA. 1982a. Microscale patchiness of ‘nutrients in plankton communities. Science 216: 729-730. -, AND -. 1982b. Microscale nutrient patches produced by zooplankton. Proc. Natl. Acad. Sci. USA 79: 5001-5005. LEVINE, S. N., AND D. W. SCHINDLER. 1980. Radiochemical analysis of orthophosphate concentrations and seasonal changes in the flux of orthophosphate to seston in two Canadian Shield lakes. Can. J. Fish. Aquat. Sci. 37: 479-487. PATALAS, K. 197 1. Crustacean plankton communities in forty-five lakes in the Experimental Lakes Area, northwestern Ontario. J. Fish. Res. Bd. Can. 28: 231-244. PETERS, R. H. 1979. Concentrations and kinetics of phosphorus fractions along the trophic gradient of Lake Memphremagog. J. Fish. Res. Bd. Can. 36: 970-979. -, AND F. H. RIGLER. 1973. Phosphorus release by Daphnia. Limnol. Oceanogr. 18: 821-839. RIGLER, F. H. 1964. The phosphorus fractions and turnover times of inorganic phosphorus in different types of lakes. Limnol. Oceanogr. 9: 5 1 l-5 18. SMITH, R. E., AND J. KALFF. 1982. Size-dependent phosphorus uptake kinetics and cell quota in phytoplankton. J. Phycol. 18: 275-284. TURPIN, D. H., J. S. PARSLOW, AND P. J. HARRISON. 198 1. On limiting nutrient patchiness and phytoplankton growth: A conceptual approach. J. Plankton Res. 3: 42 l-43 1. WILLIAMS, P. J., AND L. R. MUIR. 198 1. Diffusion as a constraint on the biological importance of microzones in the sea, p. 209-2 18. Zn Ecohydrodynamics. Elsevier Ocean Sci. Ser. 5(32).
منابع مشابه
Comparison of Ecological Patches' Potentials and Functions in Rangeland Ecosystems (Case Study: Qahavand Rangelands, Hamedan Province, Iran)
Interrupting the processes which control ecosystem resources has dramatic impacts on the rangeland conditions. To protect ecosystems and landscape, it needs to understand the ecosystem processes which regulate the ecosystem resources. As main components of ecosystems, patches and inter-patches play important roles in energy and materials cascade. Ecologically, functional parameters such as stab...
متن کاملبررسی و مقایسه ویژگیهای ساختاری و عملکردی چشمانداز در لکههای اکولوژیک و وضعیتهای مختلف اکوسیستمهای مرتعی(مطالعه موردی: مراتع نیمهاستپی آغچه-اصفهان)
Rangeland condition assessment plays an important role in determining range health and applying appropriate management programs. This study aimed to evaluate the structure and function of a semi-steppe rangeland using Landscape Function Analysis technique (LFA) in different land conditions in western Isfahan province, Iran. For this purpose, 4, 3 and 7 sites in different rangeland condition cla...
متن کاملEffect of Mining Activities on Structure and Function of Rangeland Ecosystem Using the Landscape Function Analysis (LFA) (Case study: Dareh Zereshk Copper Mine, Yazd, Iran).
This study was conducted to evaluate the effect of copper extraction on the structure and function of rangelands ecosystem around the mine area in Dareh Zereshk, Yazd province, Iran. Three study sites were considered at the specified intervals of the mine (0-200, 200-500 and 500-1000m). This research was conducted from 2012 to 2013. In each location, three linear transects with a length of 50 m...
متن کاملRole of Plant Species and Ecological Patches in Conserving and Fixing Natural Landsʹ Soil Using Landscape Functional Analysis (LFA) (Case Study: Dehbar Rangeland, Torghabeh, Mashhad, Iran)
Degradation of plant patches is considered as one of the indices for rangeland degrading health condition. Investigating the accuracy of triple indices (infiltration, stability and soil nutrient cycle) presented by LFA method seems necessary to determine its efficiency in semi-arid areas with the least cost. This study aims to investigate the role of vegetative species and growing forms on soil...
متن کاملEvaluating soil surface indicators rangeland in shrubs different patches (Case Study: Gub Gugeh rangeland of Golestan province (
The aim of this study is investigates the effects of different patches shrubs on the soil surface indicators in Gub Gugeh rangelands, in Golestan Province. The sampling was taken along transects of 50 meters, which are 10 meters away from each other. Via LFA models, three factors of stability, infiltration and nutrient cycling using 11 indicators of surface soil in patch and inter-patch were me...
متن کامل