Monitoring terrestrial ecosystems by analysis of nutrient export

O’Neill, Robert V.; Ausmus, B.S.; Jackson, D. R.; Hook, R.I. Van; Voris, P. Van; Washburne, C. D.; Watson, A.P.

doi:10.1007/bf00541913

Cited by 55 publications

(21 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…La circulación de nutrientes es uno de los aspectos clave de la diná-mica de los ecosistemas terrestres, y recibe atención creciente como manifestación integradora de la conducta de los sistemas ecológicos, ya sea en condiciones naturales o bien sometidos a perturbaciones experimentales (Harwell et al 1977, Likens et al 1970, O'Neill et al 1977, Van Voris et al 1980, Webster et al 1975). …”

Section: Introductionunclassified

Circulación de nutrientes en algunos ecosistemas forestales del Montseny (Barcelona)

Ferrés¹,

Llanza²,

González³

et al. 1984

MDTRRA

View full text Add to dashboard Cite

Section: Introductionunclassified

Circulación de nutrientes en algunos ecosistemas forestales del Montseny (Barcelona)

Ferrés¹,

Llanza²,

González³

et al. 1984

MDTRRA

View full text Add to dashboard Cite

“…These studies have not addressed the complexity of organismal interactions within intact ecosystems. Effects of chemical stress on an entire ecosystem cannot be inferred from studies of separate ecosystem components, as the interconnections among these components are not additive (O'Neill et al, 1977).…”

Section: Introductionmentioning

confidence: 99%

“…Soil nutrient losses in chemically stressed microcosms have been observed prior to changes in primary production or microbial populations (O'Neill et al, 1977) and may be detected regardless of which particular organisms or processes are stressed. Thus nutrient loss via soil water from terrestrial ecosystems is perceived to be a sensitive indicator of chemically-induced stress which integrates all soil processes.…”

Section: Introductionmentioning

confidence: 99%

Effects of arsenic on nutrient dynamics of grassland microcosms and field plots

Jackson

Ausmus

Levin

1979

Water Air Soil Pollut

View full text Add to dashboard Cite

Grassland field plots were compared to two sizes of excised microcosms (15 and 30 cm diameter) and 30-cm diameter homogenized microcosms to assess the effects of As on soil-plant nutrient dynamics. The goal of this experiment was to determine the feasibility of using microcosms for screening chemicals which are potentially toxic to terrestrial ecosystems. All experimental units were treated with As, at rates of 0, 0.5, and 5.0 mg cm -2, by superficial application of dissolved Na2AsO 4. Calcium, PO4-P , NO3-N , dissolved organic carbon (DOC), and NH4-N were determined in soil leachate and soil extracts. Greater loss of PO4-P, NO3-N, NH4-N , and DOC occurred via soil leachate from microcosms treated with the greatest level of As relative to untreated microcosms. Field plots were unaffected by As treatment. Excised microcosms were found to be more representative of field plots in reflecting microbial dynamics than were homogenized microcosms. Thus excised microcosms were recommended for testing potentially hazardous chemicals.

show abstract

“…Additionally, nutrient cycling is affected and mineralization is delayed (e.g. Jackson and Watson 1977;O'Neill et al 1977;Williams et al 1977) which may cause a long-term decline in primary production in heavy metal-contaminated woodlands (Tyler 1972;McNeilly et al 1984). Furthermore, several publications have proven that heavy metal has an impact on abundance and dominance of several soil animal taxa (e.g.…”

confidence: 99%

Impact of heavy metals on mass and energy flux within the decomposition process in deciduous forests

et al. 1995

View full text Add to dashboard Cite

: Laboratory experiments on microbial decomposition and on the contribution of diplopods to organic matter decomposition in soil were combined with field studies to reveal the major points of heavy metal effects on the leaf litter decomposition process. The study focused on the accumulation of organic litter material in heavy metal-contaminated soils. Microbial decomposition of freshly fallen leaves remained quantitatively unaffected by artificial lead contamination (1000 mg kg(-1)). The same was true for further decomposed leaf litter material, provided that the breakdown of this material was not influenced by faunal components. Although nutrient absorption in diplopods is affected by high lead contents in the food, this effect alone, however, was shown not to be sufficient for the massive deceleration of the decomposition process under heavy metal influence which could not only be observed in the field but occurred in microcosm studies as well. Reduced reproduction and lower activity of the diplopods most likely were responsible for the observation that lead-influenced diplopods enhanced microbial activity in soil only in a lesser degree than uncontaminated animals did. This effect is assigned to represent the main reason for decreased decomposition rates and the subsequent accumulation of organic material in heavy metal-contaminated soils.

show abstract

Monitoring terrestrial ecosystems by analysis of nutrient export

Cited by 55 publications

References 6 publications

Circulación de nutrientes en algunos ecosistemas forestales del Montseny (Barcelona)

Circulación de nutrientes en algunos ecosistemas forestales del Montseny (Barcelona)

Effects of arsenic on nutrient dynamics of grassland microcosms and field plots

Impact of heavy metals on mass and energy flux within the decomposition process in deciduous forests

Contact Info

Product

Resources

About