Abstract
Retention of particulate organic matter was investigated over a range of water discharges in pool and riffle zones of a tropical stream (Itaúna Stream, São Paulo, Brazil). A closed-system leaf release and capture method was used to quantify leaf retention in a 50-m reach of the stream. Instantaneous retention rates (k) were calculated by a negative exponential model and specific retention rates (k e) computed for each 1m interval. The mean k was 0.0161±0.0101 (S.E.) and ranged from 0.005 to 0.036 during the study period. This suggests a low retention of particulate matter. The evidence provided by this study shows that there was a relationship between retention and discharge. At low discharges, greater percentages of leaves were retained in a 3-h period while high discharges resulted in low retention percentages within the studied reach. In the Itaúna Stream, no significant difference (p<0.05) was found between the k e values of pool and riffle zones.
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Afonso, A. A. de O., Henry, R. & Maimoni-Rodella, R. C. S., 2000. Allochthonous matter input in two different stretches of a headstream (Itatinga, São Paulo, Brazil). Braz. Arch. Biol. Tech. 43: 335-34
Canhoto, C. & Graça, M. A. S., 1998. Leaf retention: a comparative study between two stream categories and leaf types. Verh. int. Ver. Limnol. 26: 990-993.
Cummins, K. W., Minshall, G. W., Sedell, J. R., Cushing, C. E. & Petersen, R. C., 1984. Stream ecosystem theory. Verh. int. Ver. Limnol. 22: 1818-1827.
Cummins, K. W., Wilzbach, M. A., Gates, D. M., Perry, J. B. & Talaiferro, W. B., 1989. Shredders and riparian vegetation. BioScience 39: 24-30.
Petersen, L. B. M. & Petersen, R. C. Jr., 1991. Short term retention properties of channelized and natural streams. Verh. int. Ver. Limnol. 24: 1756-1759.
Pringle, C. M., Naiman, R. J., Bretschko, G., Karr, J. R., Oswood, M. W., Webster, J. R., Welcomme, R. L. & Winterbourn, M. J., 1988. Patch dynamics in lotic systems: the stream as a mosaic. J. n. am. Benthol. Soc. 7: 503-524.
Prochazka, K., Stewart, B. A. & Davies, B. R., 1991. Leaf litter retention and its implications for shredder distribuition in two headwater streams. Arch. Hydrobiol. 120: 315-325.
Snaddon, C., Stewart, B. A., & Davies, B. R., 1992. The effect of discharge on leaf retention in two headwater streams. Arch. Hydrobiol. 125: 109-120.
Sokal, R. R. & Rohlf, F. J., 1995. Biometry. W. H. Freeman, New York: 887 pp.
Speaker, R, Moore, K. & Gregory, S., 1984. Analysis of the process of retention of organic matter in stream ecosystems. Verh. int. Ver. Limnol. 23: 1835-1841.
Townsend, C. R. & Hildrew, A. G., 1988. Pattern and process in low order acid streams. Verh. int. Ver. Limnol. 23: 1267-1271.
Uieda, V. S. & Gajardo, I. C. S. M., 1996. Macroinvertebrados perifíticos encontrados em poções e corredeiras de um riacho. Naturalia 21: 31-47.
Young, S. A., Kovalak, W. P. & Del Signore, K. A., 1978. Distances traveled by autumn-shed leaves introduced into a woodland stream. Am. Midl. Nat. 100: 217-222.
Zar, J. H., 1996, Biostatistical Analysis. Prentice-Hall, Inc., Englewood Cliffs, NJ: 662 pp.
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Adelina de Oliveira Afonso, A., Henry, R. Retention of particulate organic matter in a tropical headstream. Hydrobiologia 482, 161–166 (2002). https://doi.org/10.1023/A:1021220600302
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DOI: https://doi.org/10.1023/A:1021220600302