Soluble Reactive Phosphorus Transport and Retention in Tropical, Rainforest Streams Draining a Volcanic and Geothermally Active Landscape in Costa Rica. : Long-Term Concentration Patterns, Pore Water Environment and Response to ENSO Events

Triska, Frank J.; Pringle, Catherine M.; Avanzino, Ronald J.; Ramírez, Alonso; Ardón, Marcelo; Jackman, Alan P.

doi:10.1007/s10533-006-9026-6

Cited by 17 publications

(18 citation statements)

References 41 publications

(42 reference statements)

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“…The increases in Fe 2+ , Al i , and H 2 PO 4 in response to acidification at the Arboleda-Trib 10 m station (Fig. 4A) agree with the episodic increases in P concentrations observed in a long term record of three streams (Triska et al, 2006). Our results indicate that low pH in Arboleda-Trib 10 m led to the dissolution of ferric and aluminum phosphate compounds, leading to the release of P. Desorption of phosphorus in response to low pH has been observed in temperate streams and wetlands (Reddy et al, 1999).…”

Section: Tablesupporting

confidence: 82%

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Experimental acidification of two biogeochemically-distinct neotropical streams: Buffering mechanisms and macroinvertebrate drift

Ardón¹,

Ramírez²,

Small³

et al. 2013

Science of The Total Environment

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Section: Tablesupporting

confidence: 82%

“…We have documented increased stream water P concentrations (Triska et al, 2006) and pH declines associated with ENSO events (Small et al, 2012). The increases in Fe 2+ , Al i , and H 2 PO 4 in response to acidification at the Arboleda-Trib 10 m station (Fig.…”

Section: Tablementioning

confidence: 75%

Experimental acidification of two biogeochemically-distinct neotropical streams: Buffering mechanisms and macroinvertebrate drift

Ardón¹,

Ramírez²,

Small³

et al. 2013

Science of The Total Environment

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“…Channel widths range from 1 to 3 m, and the dominant substrata are detritus, silt, and clay, with boulders present at some sites. Our seven study streams are a subset of sites used in a long-term study of the physicochemistry of La Selva streams (Pringle and Triska 1991;Triska et al 2006), for which continuous monthly data have been available since 1997. We analyzed the elemental composition of leaf litter and epilithon at all seven sites.…”

Section: Study Sitementioning

confidence: 99%

Deviation from strict homeostasis across multiple trophic levels in an invertebrate consumer assemblage exposed to high chronic phosphorus enrichment in a Neotropical stream

2009

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A central tenet of ecological stoichiometry is that consumer elemental composition is relatively independent of food resource nutrient content. Although the P content of some invertebrate consumer taxa can increase as a consequence of P-enriched food resources, little is known about how ecosystem nutrient loading can affect the elemental composition of entire consumer assemblages. Here we examine the potential for P enrichment across invertebrate consumer assemblages in response to chronic high P loading. We measured elemental ratios in invertebrate consumers and basal food resources in a series of streams in lowland Costa Rica that range widely in P levels (2-135 microg l(-1) soluble reactive P). Streams with high P levels receive natural long-term (over millennia) inputs of solute-rich groundwater while low-P streams do not receive these solute-rich groundwater inputs. P content of leaf litter and epilithon increased fourfold across the natural P gradient, exceeding basal resource P content values reported in the literature from other nutrient-rich streams. Invertebrate consumers from the high-P study stream were elevated twofold in P content across multiple taxonomic and functional feeding groups, including predators. Our results strongly support the hypothesis that elevated P content in consumers feeding on P-enriched food resources is a consequence of deviation from strict homeostasis. In contrast to prior studies, we found that between-stream variation in P content of a given taxon greatly exceeded within-stream variation among different taxa, suggesting that environment may be as important as phylogeny in controlling consumer stoichiometry. Relaxing the assumption of strict homeostasis presents challenges and opportunities for advancing our understanding of how nutrient limitation affects consumer growth. Moreover, our findings may provide a window into the future of how chronic anthropogenic nutrient loading can alter stoichiometric relationships in food webs.

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“…Tectonically active areas are common worldwide (Fig. 1A) and nutrient concentrations may be high (e.g., Pringle et al 1993, Valentino et al 1999, Ramos-Escobedo and Váz-quez 2001, but exports of biologically important solutes in GMG-influenced surface waters have been quantified in relatively few locations, e.g., New Zealand (White and Downes 1977, Burger et al 2008, Hoellein et al 2012, the western USA (McCleskey et al 2007), and Costa Rica (Triska et al 2006.…”

mentioning

confidence: 99%

Interbasin flow of geothermally modified ground water stabilizes stream exports of biologically important solutes against variation in precipitation

et al. 2015

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Geothermally modified ground water (GMG) in tectonically active areas can be an important source of stream nutrients, and the relative importance of GMG inflows is likely to change with shifts in precipitation that are predicted to occur in response to climate change. However, few studies have quantified the influence of GMG inflows on export of biologically important solutes from watersheds across years differing in precipitation. We quantified N, soluble reactive P (SRP), and dissolved organic C (DOC) export during a year with high precipitation (6550 mm rain) and a year with average precipitation (4033 mm rain) in 2 gauged tropical streams at La Selva Biological Station in lowland Costa Rica. One stream receives extensive inputs of regional GMG, whereas the other is fed entirely by local runoff. In the stream fed only by local runoff, a 62% increase in precipitation from the dry year to the wet year led to a 68% increase in stream discharge, a 67% increase in export of SRP, DOC, dissolved organic N (DON), and NH 4 + , and a 91% increase in NO 3 -export. In contrast, in an adjacent stream where >⅓ of discharge consists of GMG, the same increase in precipitation from dry year to wet year led to a 14% increase in discharge, a 14 to 31% increase in export of NO 3 -, NH 4 + , DON, and DOC, and only a 2% increase in SRP export. We are unaware of an SRP export rate from a natural system that is higher than the export from the stream receiving interbasin flow of GMG (19 kg ha -1 y -1 ). Our results illustrate that regional ground water, geothermally modified or not, can stabilize stream export of biologically relevant solutes and water across a varying precipitation regime.

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Soluble Reactive Phosphorus Transport and Retention in Tropical, Rainforest Streams Draining a Volcanic and Geothermally Active Landscape in Costa Rica. : Long-Term Concentration Patterns, Pore Water Environment and Response to ENSO Events

Cited by 17 publications

References 41 publications

Experimental acidification of two biogeochemically-distinct neotropical streams: Buffering mechanisms and macroinvertebrate drift

Experimental acidification of two biogeochemically-distinct neotropical streams: Buffering mechanisms and macroinvertebrate drift

Deviation from strict homeostasis across multiple trophic levels in an invertebrate consumer assemblage exposed to high chronic phosphorus enrichment in a Neotropical stream

Interbasin flow of geothermally modified ground water stabilizes stream exports of biologically important solutes against variation in precipitation

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