Comparison of Dissolved Organic Carbon Bioavailability from Native and Invasive Vegetation along a Hawaiian River

Wiegner, Tracy N.; Tubal, Randee L.

doi:10.2984/64.4.545

Cited by 9 publications

(4 citation statements)

References 34 publications

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“…, 2001). These novel assemblages often differ in rates of litter production (Ellis, Crawford & Molles, 1998) and can affect loading of bioavailable DOC to streams (Wiegner & Tubal, 2010). Overall, we expect the quantity, form and timing of DOC transfer to aquatic ecosystems to change significantly following removal or modification of riparian habitats within a catchment.…”

Section: How Do Human Activities Affect the Quantity And Quality Of Dmentioning

confidence: 99%

“…In cases where buffer strips are not in agricultural production, the riparian plant community can still be substantially different from its original (native) composition, often dominated by invasive species (Tickner et al, 2001). These novel assemblages often differ in rates of litter production (Ellis, Crawford & Molles, 1998) and can affect loading of bioavailable DOC to streams (Wiegner & Tubal, 2010). Overall, we expect the quantity, form and timing of DOC transfer to aquatic ecosystems to change significantly following removal or modification of riparian habitats within a catchment.…”

Section: Plant Typementioning

confidence: 99%

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Contemporary changes in dissolved organic carbon (DOC) in human‐dominated rivers: is there a role for DOC management?

Stanley¹,

Powers²,

Lottig³

et al. 2011

Freshwater Biology

249

196

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1. Dissolved organic carbon (DOC) plays a central role in the dynamics of stream and river ecosystems, affecting processes such as metabolism, the balance between autotrophy and heterotrophy, acidity, nutrient uptake and bioavailability of toxic compounds. However, despite its importance to stream processes, restoration and management activities rarely incorporate DOC as a major management criterion. 2. Lotic DOC pools reflect terrestrial organic carbon accumulation, transfer to the river channel and aquatic processing. In pristine landscapes, characteristics such as topography, climate, and landscape composition are strong predictors of terrestrial accumulation and transfer. Within aquatic systems, the quantity and form of DOC are altered by a variety of processes including primary production, microbial breakdown, sorption to particles and photodegradation. 3. Terrestrial accumulation, transfer and aquatic processing of DOC in agricultural and other human-dominated landscapes are all subject to substantial change. Consequently, DOC pools in agricultural streams likely differ from historic conditions and now include more labile material and low concentrations of a variety of ubiquitous synthetic organic compounds (e.g. pesticides, antibiotics). 4. Although DOC change in agricultural streams and associated ecological consequences are expected to be widespread, current understanding and relevant data needed to manage affected systems are surprisingly scarce. 5. Wetland and riparian restoration projects have variable effects on fluvial DOC regimes, but management at this intermediate scale is a realistic compromise between the small extent of most restoration projects and the large spatial scale over which organic carbon impairment occurs.

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Section: How Do Human Activities Affect the Quantity And Quality Of Dmentioning

confidence: 99%

Section: Plant Typementioning

confidence: 99%

Contemporary changes in dissolved organic carbon (DOC) in human‐dominated rivers: is there a role for DOC management?

Stanley¹,

Powers²,

Lottig³

et al. 2011

Freshwater Biology

249

196

View full text Add to dashboard Cite

show abstract

“…Despite these modeled results, few studies have attempted to build carbon budgets from Pacific high islands; most studies have focused on POC and DOC fluxes from the Hawaiian Islands (Ringuet and MacKenzie, 2005;Mead and Wiegner, 2010;Wiegner and Tubal, 2010;Johnson and Wiegner, 2014). Baseline information on carbon budgets from high-island streams and groundwater and the factors that influence those budgets are paramount as human populations are expected to significantly increase in this area of the world over the next 25 years (Laws and Ferentinos, 2003) and climate and precipitation patterns are expected to change (Chu and Chen, 2005;Timm and others, 2011).…”

Section: Baseline and Projected Future Carbon Storage And Carbon Fluxmentioning

confidence: 99%

“…As a result, leaf-litter breakdown is much slower and is limited to fungal and microbial activity as well as physical abrasion (MacKenzie and others, 2013) resulting in a high export of coarse particulate organic carbon, especially during storm flows (Larned, 2000;Wiegner and others, 2009). Despite the lack of shredding insects, dissolved organic carbon (DOC) is still an important component of Pacific-island streams (Wiegner and others, 2009;Wiegner and Tubal, 2010) and nearshore waters (Atwood and others, 2012;Johnson and Wiegner, 2014). Modeled DOC fluxes from Pacific high islands in the Oceania region were equal to DOC fluxes to coastal zones in North America and Africa, with the per-area rate of DOC flux being greater in Oceania than anywhere in the world (Harrison and others, 2005).…”

Section: Baseline and Projected Future Carbon Storage And Carbon Fluxmentioning

confidence: 99%

Baseline and projected future carbon storage and carbon fluxes in ecosystems of Hawai‘i

Selmants¹,

Giardina²,

Jacobi³

et al. 2017

Professional Paper

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Dissolved organic carbon uptake in streams: A review and assessment of reach‐scale measurements

et al. 2016

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Quantifying the role that freshwater ecosystems play in the global carbon cycle requires accurate measurement and scaling of dissolved organic carbon (DOC) removal in river networks. We reviewed reach‐scale measurements of DOC uptake from experimental additions of simple organic compounds or leachates to inform development of aquatic DOC models that operate at the river network, regional, or continental scale. Median DOC uptake velocity (vf) across all measurements was 2.28 mm min−1. Measurements using simple compound additions resulted in faster vf (2.94 mm min−1) than additions of leachates (1.11 mm min−1). We also reviewed published data of DOC bioavailability for ambient stream water and leaf leachate DOC from laboratory experiments. We used these data to calculate and apply a correction factor to leaf leachate uptake velocity to estimate ambient stream water DOC uptake rates at the reach scale. Using this approach, we estimated a median ambient stream DOC vf of 0.26 mm min−1. Applying these DOC vf values (0.26, 1.11, 2.28, and 2.94 mm min−1) in a river network inverse model in seven watersheds revealed that our estimated ambient DOC vf value is plausible at the network scale and 27 to 45% of DOC input was removed. Applying the median measured simple compound or leachate vf in whole river networks would require unjustifiably high terrestrial DOC inputs to match observed DOC concentrations at the basin mouth. To improve the understanding and importance of DOC uptake in fluvial systems, we recommend using a multiscale approach coupling laboratory assays, with reach‐scale measurements, and modeling.

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Comparison of Dissolved Organic Carbon Bioavailability from Native and Invasive Vegetation along a Hawaiian River

Cited by 9 publications

References 34 publications

Contemporary changes in dissolved organic carbon (DOC) in human‐dominated rivers: is there a role for DOC management?

Contemporary changes in dissolved organic carbon (DOC) in human‐dominated rivers: is there a role for DOC management?

Baseline and projected future carbon storage and carbon fluxes in ecosystems of Hawai‘i

Dissolved organic carbon uptake in streams: A review and assessment of reach‐scale measurements

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