+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Nutrient losses in runoff from grassland and shrubland habitats in Southern New Mexico: I. Rainfall simulation experiments

, : Nutrient losses in runoff from grassland and shrubland habitats in Southern New Mexico: I. Rainfall simulation experiments. Biogeochemistry (Dordrecht) 45(1): 21-34, April

Rainfall simulation experiments were performed in areas of semiarid grassland (Bouteloua eriopoda) and arid shrubland (Larrea tridentata) in the Chihuahuan desert of New Mexico. The objective was to compare the runoff of nitrogen (N) and phosphorus (P) from these habitats to assess whether losses of soil nutrients are associated with the invasion of grasslands by shrubs. Runoff losses from grass- and shrub-dominated plots were similar, and much less than from bare plots located in the shrubland. Weighted average concentrations of total dissolved N compounds in runoff were greatest in the grassland (1.72 mg/l) and lowest in bare plots in the shrubland (0.55 mg/l). More than half of the N transported in runoff was carried in dissolved organic compounds. In grassland and shrub plots, the total N loss was highly correlated to the total volume of discharge. We estimate that the total annual loss of N in runoff is 0.25 kg/ha/yr in grasslands and 0.43 kg/ha/yr in shrublands - consistent with the depletion of soil N during desertification of these habitats. Losses of P from both habitats were very small.


DOI: 10.1007/bf00992871

Other references

Ronchi, C.L.; Rizzo, E.; Lania, A.G.; Pivonello, R.; Grottoli, S.; Colao, A.; Ghigo, E.; Spada, A.; Arosio, M.; Beck-Peccoz, P., 2008: Preliminary data on biochemical remission of acromegaly after somatostatin analogs withdrawal. Objective: It is still unknown whether prolonged treatment with somatostatin analogs (SSTa) may cause a long-lasting disease remission in GH-secreting adenomas after drug discontinuation. The aim of the present study was to investigate the evoluti...

Quadri S.K.; Oyama T.; Spies H.G., 1979: Serum prolactin responses to estrogen and thyrotropin releasing hormone in rhesus monkeys. Federation Proceedings 38(3 PART 1): 1185

Fiscus, R.R.; Dyer, D.C., 1982: Effects of indomethacin on contractility of isolated human umbilical artery. Contractions of isolated strips of human umbilical artery (HUA) induced by arachidonic acid were antagonized by indomethacin at concentrations as low as 1 microgram/ml. Much higher concentrations (25 and 65 microgram/ml) were needed to relax KCl-c...

Spraul, C.W.; Lang, G.K., 1998: "Curriculum" in ophthalmology: Assistant education in Ulm. Klinische Monatsblatter für Augenheilkunde 211(3): A8-11

Bayramoğlu, M.; Akman, M.N.; Karataş, M.; Sözay, S., 2002: Occurrence of bilateral sacroiliitis and ossification of anterior spinal ligaments in the same patient. Abstract Enthesopathy and ligament calcification may occur in both the degenerative and inflammatory types of diffuse idiopathic skeletal hyperostosis and ankylosing spondylitis. Despite their fairly frequent occurence in rheumatic disease care se...

Swansbury, J., 2003: Some difficult choices in cytogenetics. In making a selection of features of these technologies, it is inevitable that some will be omitted that other cytogeneticists feel should have been included. The author could probably justifiably be accused of bias. However, based on experience i...

Johnson; Koenraad; van der Vleuten WC.S.lemink; Wolter, 1995: Be Delta-Doped Layers in GaAs Imaged with Atomic Resolution Using Scanning Tunneling Microscopy. Physical Review Letters 75(8): 1606-1609

Thelen E., 1979: Rhythmical stereotypies in normal human infants. Naturalistic, longitudinal observations of 20 normal infants biweekly during their 1st yr showed that they performed a great quantity and variety of rhythmical and highly stereotyped behaviors. Movement patterns [47] are described involving the le...

Eagle, K.A.; Weinberg, R.L., 2016: In severe aortic stenosis, TAVR was noninferior to conventional surgery for death or disabling stroke at 2 years. Annals of Internal Medicine 165(4): Jc21-Jc21

Reis, S.E.; Wu, C.C.; Counihan, P.J.; Smith, A.J.C.nrad; Cohen, H.A.; Zell, K.A.; Blumenthal, R.S.; Feldman, M.D., 1995: Estrogen has an acute beneficial effect on coronary vasoreactivity in men. Circulation 92(8 SUPPL ): I249