A review of land–sea coupling by groundwater discharge of nitrogen to New England estuaries: Mechanisms and effects

Bowen, Jennifer L.; Kroeger, Kevin D.; Tomasky, Gabrielle; Pabich, Wendy J.; Cole, Marci L.; Carmichael, Ruth H.; Valiela, Iván

doi:10.1016/j.apgeochem.2006.09.002

Cited by 97 publications

(79 citation statements)

References 100 publications

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“…Whilst land-river and land-lake connections have long been recognized (Carpenter et al 1998), the land-to-sea connections have received comparatively little attention along human-dominated coastlines (Cloern 2001). Land-to-sea connections have primarily focused on changes in estuaries and bays (see reviews in Rabalais 2002, Bowen et al 2007, showing strong links between catchment related nitrogen and shifts in abundance of submerged aquatic vegetation from slow-growing seagrasses and large macroalgae to fast-growing macro- FIG. 5.…”

Section: Managing Connected Land-to-seascapesmentioning

confidence: 99%

“…In contrast, nitrogen isotope values of rapidly growing algal indicator species (e.g., Ulva australis) provide an assessment of the available nitrogen pool over weeks (Aguiar et al 2003, Teichberg et al 2007) and can be used to identify its source (i.e., wastewater, agricultural products or atmospheric deposition; Cole et al 2004). This technique has been successfully applied to identify linkages between terrestrial catchments and estuarine habitats (e.g., McClelland and Valiela 1998, Valiela et al 2000, Bowen et al 2007 but not on open rocky coasts. The second step, therefore, assessed links between elevated subsidies derived from human sources of nitrogen (i.e., sewage effluent, fertilizer) using stable isotope values of an algal indicator Fry 1987, Costanzo et al 2001).…”

Section: Introductionmentioning

confidence: 99%

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Land‐to‐sea connectivity: linking human‐derived terrestrial subsidies to subtidal habitat change on open rocky coasts

Gorman

Russell

Connell³

2009

Ecological Applications

115

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Transfer of CopyrightThe Author(s) shall retain the right to quote from, reprint, translate and reproduce the work, in part or in full, in any book or article he/she may later write, or in any public presentation. The Author may post the work in a publicly accessible form on his/her personal or home institution's webpages. DATE: 27 August 2012Ecological Applications, 19(5), 2009Applications, 19(5), , pp. 1114Applications, 19(5), -1126Applications, 19(5), Ó 2009 Abstract. Spatial subsidies are considered strong where differences in resource availability between donor and recipient systems are greatest. We tested whether human activities on land can increase subsidies of terrigenous nitrogen to open rocky coasts and whether these differences can predict apparent deforestation of kelp forests. We first identified landscapescale variation in the human-mediated transfer of dissolved inorganic nitrogen (DIN) from natural, agricultural, and urban catchments to temperate coasts after episodes of rainfall. Compared to natural catchments, subsidies of DIN were on average 8-407 times greater in urban catchments, and 1-63 times greater in agricultural catchments. Urban derived nitrogen was attributed to the release of sewage effluent, as delineated by d15 N isotopic values of transplanted algae. Having made this link, we then assessed whether this catchment-scale variation may account for variation in structure of subtidal habitats, particularly as related to theory of nutrient-driven shifts of habitat from perennial (i.e., canopy-forming algae) to opportunistic species (i.e., turf-forming algae). We not only detected patterns consistent with this theory, but also established that the size and total proportion of patches of turf-forming algae were greater where the ratio of donor : recipient nitrogen loads was greater (i.e., size of subsidy). An important realization was that deforestation may be more strongly related to variation in the size of subsidy rather than size of human populations, particularly among urban catchments. These data directly link the type of human activity within catchments to the modification of land-to-sea subsidies and indirectly support theory that predicts terrestrial inputs to have greater ecological effects where the disparity in resource availability between donor and recipient is exacerbated. Our evidence has been used by coastal managers to reconsider their management of coastal systems and has subsequently contributed to new water-recycling policy and initiatives.

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Section: Managing Connected Land-to-seascapesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Land‐to‐sea connectivity: linking human‐derived terrestrial subsidies to subtidal habitat change on open rocky coasts

Gorman

Russell

Connell³

2009

Ecological Applications

115

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“…In this study, we take advantage of the sub-estuaries of Waquoit Bay, Massachusetts, USA, that receive different N loads imparted from different land uses on their watersheds (Valiela et al 1992, Kroeger et al 1999, Valiela & Bowen 2002, Bowen et al 2007). We examined 3 of the sub-estuaries that receive relatively low N loads (< 35 kg N ha -1 yr -1…”

Section: Abstract: Eutrophication · Nitrogen Load · Zostera Marina ·mentioning

confidence: 99%

δ15N and δ13C reveal differences in carbon flow through estuarine benthic food webs in response to the relative availability of macroalgae and eelgrass

Olsen¹,

Fox²,

Teichberg

et al. 2011

Mar. Ecol. Prog. Ser.

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“…It is nowadays well accepted that the role of submarine groundwater discharge is at least in the same order of magnitude as discharge to the oceans from rivers and streams. In contrast, there is still less awareness of the role of LGD, particularly as it applies to lake nutrient budgets, even though the first studies of LGD date back to 1940 (Hubbert 1940, Harvey et al 2000, Bowen et al 2007. Groundwater can be a relevant component in the water and nutrient budgets, even in some large lakes (e.g.…”

Section: Discussionmentioning

confidence: 99%

From submarine to lacustrine groundwater discharge

et al. 2015

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Submarine groundwater discharge (SGD) and its role in marine nutrient cycling are well known since the last decade. The freshwater equivalent, lacustrine groundwater discharge (LGD), is often still disregarded, although first reports of LGD are more than 50 years old. We identify nine different reasons why groundwater has long been disregarded in both freshwater and marine environments such as invisibility of groundwater discharge, the size of the interface and its difficult accessibility. Although there are some fundamental differences in the hydrology of SGD and LGD, caused primarily by seawater recirculation that occurs only in cases of SGD, there are also a lot of similarities such as a focusing of discharge to near-shore areas. Nutrient concentrations in groundwater near the groundwater-surface water interface might be anthropogenically enriched. Due to spatial heterogeneity of aquifer characteristics and biogeochemical processes, the quantification of groundwater-borne nutrient loads is challenging. Both nitrogen and phosphorus might be mobile in near-shore aquifers and in a lot of case studies large groundwater-borne nutrient loads have been reported.

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A review of land–sea coupling by groundwater discharge of nitrogen to New England estuaries: Mechanisms and effects

Cited by 97 publications

References 100 publications

Land‐to‐sea connectivity: linking human‐derived terrestrial subsidies to subtidal habitat change on open rocky coasts

Land‐to‐sea connectivity: linking human‐derived terrestrial subsidies to subtidal habitat change on open rocky coasts

δ15N and δ13C reveal differences in carbon flow through estuarine benthic food webs in response to the relative availability of macroalgae and eelgrass

From submarine to lacustrine groundwater discharge

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