Summary
The nematode community in litter and soil was examined for a year in the Chihuahuan desert, before and after supplemental rainfall application. Proportions of nematode-active or anhydrobiotic forms and population densities were determined for 3 treatments: control (natural rainfall), a single, large (25-mm) monthly irrigation pulse, and 4 smaller (6-mm) irrigations spaced at weekly intervals. In litter the greatest nematode abundance was in the 6 mm week−1 treatment (48 nematodes 20 g−1 litter). Bacteriovores and fungivores accounted for approximately 95% of the numbers and biomass in all treatments. In soil, water amendments had no significant effect (P < 0.05) on annual mean densities of total nematodes, fungivores, bacterivores, or omnivore predators. Phytophage densities were greater on both irrigation treatments, with highest densities (9268 m−2) in the 6 mm week−1 soils, which was 5.9% of the total soil nematode density. Total densities of individual trophic groups were not significantly different before or after rainfall. Soil nematode densities fluctuated independently with trophic group, month, and season. Bacterial feeders and omnivore predators were the largest contributor to total soil nematode density and biomass. Prior to irrigation, there were no differences in the percentage of anhydrobiotes on the three treatments. Anhydrobiotes decreased after irrigation in all treatments, and were significantly lower in soils of the larger, monthly irrigation. Nematodes were inactive (anhydrobiotic) and decoupled from decomposition processes when soil water matric potentials reached −0.4 MPa.
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References
Andrassy I (1956) Die Rauminhalts- und Gewichtsbestimmung der Fadenwürmer (Nematoden). Acta Zool Acad Sci Hung 2:1–15
Campbell EC (1972) Vapor sink and thermal effects on psychrometer calibration. In: Brown RW, Van Haveran BP (eds) Psychrometry in water relations research. Utah Agric Expt Sta Logan, Utah, pp 94–97
Cate RB, Jr, Nelson LA (1971) A simple statistical procedure for partitioning soil test correlation data into two classes. Soil Sci Soc Am Proc 35:658–659
Coolen WA (1979) Methods for the extraction of Meloidogyne spp. and other nematodes from roots and soil. In: Lamberti F, Taylor CE (eds) Root-knot nematodes (Meloidogyne species). Systematics, biology and control. Academic Press, New York, pp 317–329
Demeure Y, Freckman DW (1981). Recent advances in the study of anhydrobiosis in nematodes. In: Zuckerman BM, Rohde RA (eds) Plant parasitic nematodes, vol III. Academic Press, New York, pp 204–225
Demeure Y, Freckman DW, Van Gundy SD (1979a). Anhydrobiotic coiling of nematodes in soil. J Nematol 11:189–195
Demeure Y, Freckman DW, Van Gundy SD (1979b). In vitro response of four species of nematodes to desiccation and discussion of this and related phenomena. Rev Nematol 2:203–210
Demeure Y, Reversat G, Van Gundy SD, Freckman DW (1978). The relation between nematode reserves and their survival to desiccation. Nematropica 8:7–8
Freckman DW (1978) Ecology of anhydrobiotic soil nematodes. In: Crowe JH, Clegg JS (eds) Dried biological systems. Academic Press, New York, pp 345–357
Freckman DW (1982) Parameters of the nematode contribution to ecosystems. In: Freckman DW (ed) Nematodes in soil ecosystems. Univ Texas Press, Austin, Texas, pp 80–97
Freckman DW, Womersley C (1983) Physiological adaptations of nematodes in Chihuahuan Desert soils. In: Lebrun P, Andre HM, DeMedts A, Gregoire-Wibo C, Wauthy G (eds) New trends in soil biology. Dieu-Brichart Publ., Ottignies-Louvain-la-Neuve, Belgium, pp 395–403
Freckman DW, Mankau R (1986) Abundance, distribution, biomass and energetics of soil nematodes in a northern Mojave desert ecosystem. Pedobiologia 29:129–142
Freckman DW, Mankau R, Ferris H (1975). Nematode community structure in desert soils. Nematode recovery. J Nematol 7:343–346
Freckman DW, Kaplan DT, Van Gundy SD (1977) A comparison of techniques for extraction and study of anhydrobiotic nematodes from dry soils. J Nematol 9:176–181
Freckman DW, Demeure Y, Munnecke D, Van Gundy SD (1980) Resistance of anhydrobiotic Aphelenchus avenae to methyl bromide fumigation. J Nematol 12:19–22
Noy-Meir I (1973) Desert ecosystem: environment and producers. In: Johnston RF (ed) Ann Rev Ecol Syst. Ann Rev Inc, Palo Alto, California 4:25–52
Parker LW, Santos PF, Phillips J, Whitford WG (1984). Carbon and nitrogen dynamics during the decomposition of litter and roots of a Chihuahuan desert annual, Lepidium lasiocarpum. Ecol Monogr 54:339–360
Schlesinger WH, Fonteyn PJ, Marion GM (1986). Soil moisture content and transpiration in the Chihuahuan desert of New Mexico. J Arid Environ (in press)
Simons WR (1973) Nematode survival in relation to soil moisture. Meded Landgebouwhoge-School, Wageningen 73:1–85
Southey JF (1970) Principles of sampling for nematodes. In: Southey JF (ed) Laboratory methods for work with plant and soil nematodes. Min Agric Fish Food HMSO, London, pp 1–4
Steinberger Y, Freckman DW, Parker LW, Whitford WG (1984) Effects of simulated rainfall and litter quantities on desert soil biota: Nematodes and microarthropods. Pedobiologia 26: 267–274
Whitford WG, Freckman DW, Elkins NZ, Parker LW, Parmalee R, Phillips J, Tucker S (1981) Diurnal migration and responses to simulated rainfall in desert soil: microarthropods and nematodes. Soil Biol Biochem 13:417–425
Whitford WG, Freckman DW, Parker LW, Schaeffer D, Santos P, Steinberger Y (1983) The contributions of soil fauna to nutrient cycles in desert systems. In: Lebrun P, Andre HM, DeMedts A, Gregoire-Wibo C, Wauthy G (eds) New trends in soil biology. Dieu-Brichart Publ. Ottignies-Louvain-la-Neuve, Belgium, pp 49–59
Whitford WG, Steinberger Y, McKay W, Parker LW, Freckman DW, Wallwork JA, Weems I) (1986) Rainfall and decomposition in the Chihuahuan Desert. Oecologia (in press)
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Dedicated to the late Prof. Dr. M.S. Ghilarov
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Freckman, D.W., Whitford, W.G. & Steinberger, Y. Effect of irrigation on nematode population dynamics and activity in desert soils. Biol Fert Soils 3, 3–10 (1987). https://doi.org/10.1007/BF00260571
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DOI: https://doi.org/10.1007/BF00260571