Hindcasting of nutrient loadings from its catchment on a highly valuable coastal lagoon: the example of the Fleet, Dorset, UK, 1866–2004

Abstract

Background: Nutrient loadings from its catchment upon The Fleet, a highly valuable coastal lagoon in Southern England, were hindcast for the period AD 1866-2004, using a catchment model, export coefficients, and historical data on land use changes, livestock numbers, and human population. Agriculture was the main nutrient source throughout, other inputs representing minor contributions. Permanent pasture was historically the main land use, with temporary grassland and cereals increasing during the mid-20th century. Sheep, the main 19th century livestock, were replaced by cattle during the 1930s.

Seabird influence on ecological processes in coastal marine ecosystems: An overlooked role? A critical review

“…Since the first attempts to quantify the nutrient load induced by guano release, it turned out that phosphorus and nitrogen load in estuaries and ponds may be substantial when compared to other potential sources, such as atmospheric deposition or land drainage (Bildstein et al, 1992;Portnoy, 1990), highlighting the need to include the bird contribution into nutrient budget models of semi-enclosed coastal areas. Afterwards, more recent studies reported an overall change in water and sediment chemistry in seabird-impacted areas: high pH, chlorophyll-a and dissolved and sediment nutrient concentrations were distinctive of polar (Duda et al, 2018;Keatley et al, 2009), Atlantic (Weber et al, 2006) and Mediterranean ponds (Signa et al, 2012), as well as of Pacific coral reefs (Honig and Mahoney, 2016;Lorrain et al, 2017) adjacent to big and small seabird colonies. Rainfall and tidal oscillation are the main mechanisms responsible for the nutrient runoff from the guano deposited in the areas surrounding the colonies to the adjacent coastal waters, together with the direct release of guano by overflying birds (Signa et al, 2012;Staunton Smith and Johnson, 1995).…”

“…System typology where the effects have been found, and related references, are also showed. ecological process main effect system typology reference a) resource linkage nutrient input increase in nutrient load coastal ponds, estuaries Portnoy 1990;Bildstein et al 1992 changes in nutrient cycling rocky shores Ganning and Wulff 1969;Golovkin and Garkavaya1975 change in water and sediment chemistry (high pH, chlorophyll-a and nutrient concentrations) coastal ponds Weber et al 2006;Keatley et al 2009;Signa et al 2012;Duda et al 2018 coral reefs Honig and Mahoney 2016;Lorrain et al 2017 bottom-up control on primary producers increase in phytoplankton production tidepools, coastal ponds Methratta 2004, Signa et al 2012, Shatova et al 2016, Petkuviene et al 2019 change in macroalgae community composition (shift from perennial to opportunistic species) rocky shores Wootton 1991;Kolb et al 2010;Gagnon et al 2016 species shift and increase in macrophyte biomass estuaries Powell et al 1991 Hamilton et al 2006;Cheverie et al 2014;Gagnon et al 2016 predatory pressure of cormorants potential conflicts with human fishing activities lagoons and fish ponds Leopold et al 1998, Hobson 2009, Vetemaa et al 2010, Steffens 2011 limited conflicts with human fishing activities due to niche and size segregation of fish stock Žydelis and Kontautas 2008;Doucette et al 2011;Troynikov et al 2013…”

Nutrient fluxes from domestic wastewater: A national-scale historical perspective for the UK 1800–2010

“…Piecing together a detailed quantitative picture of historical nutrient loading from wastewater using sparse data and anecdotal evidence is a huge task. Previous studies have either focused at the detailed catchment scale (Weber et al, 2006;Behrendt et al, 2008;Gadegast et al, 2012) or provided a global assessment (Bouwman et al, 2005;Van Drecht et al, 2009;Morée et al, 2013). This paper seeks to quantify the nutrient fluxes in wastewater effluent from domestic sources in the UK for the period 1800-2010 using available evidence to develop reasonable assumptions for simulating the most important changes over time.…”