Long-term changes of submerged macrophytes in the Lower Danube Wetland System

Cristofor, Sergiu; Vădineanu, Angheluţă; Sarbu, Anca; Postolache, Carmen; Dobre, Roxana; Adamescu, Mihai

doi:10.1023/b:hydr.0000008601.16757.35

Cited by 31 publications

(28 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…BaatrupPedersen & Riis, 1999), as well as spatial structure, light regime, competition or effect of animals (e.g. Dennison & Orth, 1993;Khedr & El-Demerdash, 1997;Cristofor et al, 2003;Demars & Harper, 2005;Hervé et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Diversity of aquatic macrophytes in relation to environmental factors in the Slatina river (Slovakia)

2006

View full text Add to dashboard Cite

Distribution and plant mass of aquatic macrophytes, and their relation to environmental conditions was studied in the submontane-colline Slatina river in 2004. Diversity of macrophytes was low, only 8 vascular plants, 3 mosses and group Algae filamentosae were found. Myriophyllum spicatum is dominant species, Fontinalis antipyretica, Rhynchostegium riparioides and Algae filamentosae are frequent. Interactions between flow class, bed material, depth of water and the first three mentioned macrophytes, as well as Jungermannia leiantha were detected. Sparganium erectum prefers more antrophogenic conditions and Myriophyllum spicatum prefers the light. According to cluster analysis, three distinct and ecologically well separated parts of the river were identified. Based on Reference index, poor ecological status for the studied part of the Slatina river was estimated.

show abstract

Section: Introductionmentioning

confidence: 99%

Diversity of aquatic macrophytes in relation to environmental factors in the Slatina river (Slovakia)

2006

View full text Add to dashboard Cite

show abstract

“…In the same period, the DIN : TRP ratio, a signifi cant 1 9 5 4 1 9 5 7 1 9 6 0 1 9 6 3 1 9 6 6 1 9 6 9 1 9 7 2 1 9 7 5 1 9 7 8 1 9 8 1 1 9 8 4 1 9 8 7 1 9 9 0 1 9 9 3 indicator of the trophic state (Cristofor 1987;Vadineanu et al 1987a;Cristofor et al 1993a;Kufel and Kufel 1999), decreased markedly from values of tens and hundreds (Figure 39.5) before 1980, towards values around or below 10 . This shows that the role of phosphorus (P) as a limiting factor was gradually replaced by nitrogen (N) (Vadineanu et al 1987b), with important effects upon the structure and productivity of primary producers and the availability of net primary production (Vadineanu et al 2000;Cristofor et al 2003). These indicators of transition towards new trophic conditions have been even more prominent in the inner and coastal delta lakes, where nutrient supply from the river entering these aquatic systems interacts 8 1955 1958 1959 1988 1989 1990 1991 1992 1993 1955 1958 1959 1988 1989 1990 1991 1992 1993 with phosphorus release from sediments under hypoxic and anoxic conditions (Cristofor et al 1993a).…”

Section: Nutrient Cyclingmentioning

confidence: 99%

“…The macrophyte-epiphyton complex contributes more than 80% of total annual energy in this type of hypertrophic lake (Cristofor 1987;Vadineanu et al 1989Vadineanu et al , 1992Vadineanu et al , 1998aVadineanu et al , 2000Cristofor et al 2003).…”

Section: Food Web Structure and Dynamicsmentioning

confidence: 99%

“…The aquatic ecosystems of the LDWS have been oversupplied with concentrated energy and have become much less effi cient in the provision of harvestable resources and habitats for many plants and animals species, after undergoing signifi cant qualitative and structural changes (Diaconu et al 1994;Vadineanu et al 2000Vadineanu et al , 2001aVadineanu et al ,b, 2003Cristofor et al 2003;Risnoveanu and Vadineanu 2003).…”

Section: Loss Of Fi Sheries and Other Goodsmentioning

confidence: 99%

See 1 more Smart Citation

Deterioration and Rehabilitation of the Lower Danube Wetlands System

Vădineanu

2009

The Wetlands Handbook

Self Cite

View full text Add to dashboard Cite

“…In relation to other deltas in the world, the Danube Delta is still relatively unaffected by anthropogenic inputs (Oosterberg et al 2000). Nonetheless, man-induced transition towards eu-and hypertrophy has affected biodiversity and productivity of most aquatic and wetland systems in the delta and the associated coastal Black Sea (Cristofor et al 2003). From the early 1960s to late 1980s, riverine loads of inorganic N and P increased five-and threefold, respectively (Almazov 1961; Kroiss et al 2006;Teodoru et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Organic matter governs N and P balance in Danube Delta lakes

et al. 2010

View full text Add to dashboard Cite

The transformation of dissolved inorganic nitrogen (DIN) and soluble reactive phosphorous (SRP), and the release of dissolved organic and particulate N and P, were analyzed in two lake complexes (Uzlina-Isac and Puiu-Rosu-Rosulet) of the Danube Delta wetland during flood conditions in May and at low water level in September 2006. The Uzlina-Isac complex was hydrologically tightlyconnected with the Danube River and was flushed with river-borne nutrients and organic matter. These lakes acted as effective transformers for nutrients and produced large amounts of fresh biomass, that promoted the excretion of dissolved organic N and P during active growth. Biomass breakdown created particulate matter (\0.45 lm), which was widely liberated during low flow in the fall. The PuiuRosu-Rosulet complex was characterized by a more distant position to the Danube and proximity to the Black Sea, and received dominantly transformed organic compounds from the flow-through water and vast vegetation cover. Due to reduced nutrient input, the internal production of organic biomass also was reduced in these more remote lakes. Total N and P export from the lake nearest to the shelf was governed by dominantly dissolved organic and particulate compounds (mean 58 and 82%, respectively). Overall, this survey found that these highly productive wetlands efficiently transform nutrients into a large pool of dissolved organic and particulate N and P. Hence, wetland lakes may behave widely as net sources of organic N and P to downstream waters and coastal marine systems.

show abstract

Long-term changes of submerged macrophytes in the Lower Danube Wetland System

Cited by 31 publications

References 2 publications

Diversity of aquatic macrophytes in relation to environmental factors in the Slatina river (Slovakia)

Diversity of aquatic macrophytes in relation to environmental factors in the Slatina river (Slovakia)

Deterioration and Rehabilitation of the Lower Danube Wetlands System

Organic matter governs N and P balance in Danube Delta lakes

Contact Info

Product

Resources

About