Vegetation development in abandoned gravel pits: effects of surrounding vegetation, substrate and regionality

1990 ◽  
Vol 1 (5) ◽  
pp. 675-682 ◽  
Author(s):  
Sven-Olov Borgegård
Keyword(s):  
Vegetation Development ◽  
Gravel Pits

Submerged Macrophyte Control Using Plastic Blankets

1994 ◽  
Vol 29 (4) ◽  
pp. 119-126
Author(s):  
D. R. Carter ◽  
S. Carter ◽  
J. L. Allen
Keyword(s):  
Plant Species ◽  
Sediment Accumulation ◽  
Submerged Macrophyte ◽  
Light Reduction ◽  
Control Options ◽  
Macrophyte Growth ◽  
Gravel Pits ◽  
End Use ◽  
Potential Area

Penrith Lakes Scheme is concerned with the rehabilitation of gravel pits to create a system of large recreational lakes. A potential submerged macrophyte problem has been identified in an existing man-made lake. The need to control the macrophytes is dependent on the proposed end use of the lakes and the potential area of invasion. A variety of control options were assessed. Plastic blankets were tested to determine their effectiveness in controlling macrophyte growth specifically in swimming and boat access areas. Comparisons of clear, black and black woven blankets were conducted. Experiments revealed that 90% of the plants under the black and black woven blankets died within six weeks. Under clear blankets plants were reduced by between 20%-90%. Analysis showed that significant interactions occurred between sites and treatments and times, from which it can be inferred that none are independent of each other. Success in the reduction of macrophytes appears dependent on such factors as plant species, sediment accumulation and light reduction.

Lichen Colonization and Recolonization of Two Recently Deglaciated Zones in the Maritime Antarctic

1995 ◽  
Vol 27 (6) ◽  
pp. 485-493 ◽  
Author(s):  
Fernando Valladares ◽  
Leopoldo G. Sancho
Keyword(s):  
Snow Cover ◽  
South Shetland Islands ◽  
Homogeneous Distribution ◽  
Maritime Antarctic ◽  
Vegetation Development ◽  
Lichen Cover ◽  
Glacier Front ◽  
Ice Retreat ◽  
Snow Cover Duration ◽  
Rock Size

AbstractThe stages of vegetation development close to two glacier fronts on two of the South Shetland Islands (Livingston and Robert) within the Maritime Antarctic were studied with special reference to saxicolous lichens. A lichenometric study of the crustose lichen Caloplaca sublobulata was carried out at both sites. On the moraine of Livingston Island, rock size played an important role in lichen development, explaining most of the differences observed in the diameter of C. sublobulata, the number of species, and the percentage of cover among the rocks studied. On Robert Island, the distance from the glacier front was associated with the lichen cover of the rocks but not with diameter of C. sublobulata This homogeneous distribution of C. sublobulata thallus size on the Robert Island study area points to a simultaneous recolonization of the whole zone by this lichen. The lichen development in the area studied on Robert Island seems to have been drastically affected by fluctuations in the persistence of snow cover following glacier front retreat. Tentative associations between ice retreat and colonization, on the o e hand, and changes in snow cover duration and the dynamic processes of extinction and recolonization, on the other, are suggested from comparison of the two zones.

Recovery of Degraded Areas in Vale do Paraíba, São Paulo, Brazil: Performance Indicators

2010 ◽  
Vol 107 ◽  
pp. 27-34 ◽  
Author(s):  
Maria Regina de Aquino-Silva ◽  
Marcos Roberto Simão ◽  
Denise da Silva Santos ◽  
Eduardo Jorge de Brito Bastos
Keyword(s):  
Performance Indicators ◽  
Vegetation Structure ◽  
Bank Erosion ◽  
Sand Mining ◽  
Chemical Factor ◽  
Vegetation Development ◽  
Aluminum Iron ◽  
Negative Factors ◽  
Soil Indicators ◽  
Iron And Manganese

The aim of restoration is recompose a new vegetation structure in order to obtain benefits such as the containment of bank erosion, reestablishment of a hydric and nutrient regime, and increase the diversity of species. The present paper evaluated the development of the vegetation introduced as ciliar forest around a mining lagoon through establishing indicators based on the vegetation structure, physic-chemical characteristics of the soil and the water. Results show that the indicators of vegetation, like dying of species and the covering of top were classified as negative factors. Regarding vegetation development, it was considered positive when individuals out of inundation points were analyzed. According to soil indicators, chemical factor pH acid suggests intoxication by aluminum, iron and manganese impeding development of the vegetation in the local. Topographic factor also caused erosion and dying/extinction of species localized in declining points and carried nutrients to the inundation point and finally to the sand mining pool.

Vegetation development of sown grass margins in arable fields under a countrywide agri-environment scheme

2006 ◽  
Vol 132 (1) ◽  
pp. 1-11 ◽  
Author(s):  
C. Nigel R. Critchley ◽  
John A. Fowbert ◽  
Ann J. Sherwood ◽  
Richard F. Pywell
Keyword(s):  
Vegetation Development ◽  
Arable Fields

Sedimentology, faunal content and pollen record of Middle Pleistocene palustrine and lagoonal sediments from the Peri-Adriatic basin, Abruzzi, eastern central Italy

2016 ◽  
Vol 86 (3) ◽  
pp. 359-372 ◽  
Author(s):  
Pierluigi Pieruccini ◽  
Claudio Di Celma ◽  
Federico Di Rita ◽  
Donatella Magri ◽  
Giorgio Carnevale ◽  
...  
Keyword(s):  
Shallow Water ◽  
Sea Level ◽  
Central Italy ◽  
Freshwater Wetlands ◽  
Middle Pleistocene ◽  
Pollen Record ◽  
Vegetation Development ◽  
Oxygen Isotope Stage ◽  
Open Forest ◽  
Facies Succession

AbstractA 25 m-thick outcrop section exposed at Torre Mucchia, on the sea-cliff north of Ortona, eastern central Italy, comprises a rare Middle Pleistocene succession of shallow-water and paralic sediments along the western Adriatic Sea. An integrated study of the section, including facies and microfacies analyses, and characterization of paleobiological associations (mollusks, fishes, ostracods, foraminifers and pollen), enable a detailed reconstruction of the paleoenvironmental and paleoclimatic conditions during deposition. The shallow-water deposits include a transgressive, deepening- and fining-upward shoreface to offshore-transition facies succession overlain by a regressive shoreface-foreshore sandstone body with an erosive base and a rooted and pedogenically altered horizon at the top that imply deposition during sea-level fall. This forced regressive unit is overlain by paralic strata forming a transgressive succession comprising palustrine carbonates and back-barrier lagoonal mudstones. The palustrine carbonates exhibit some of the typical features encountered in palustrine limestones deposited within seasonal freshwater wetlands (marl prairies). Following the sea-level rising trend, the freshwater marshes were abruptly replaced by a barrier-lagoon system that allowed deposition of the overlying mud-rich unit. Within these deposits, the faunal assemblages are consistent with a low-energy brackish environment characterized by a relatively high degree of confinement. The pollen record documents the development of open forest vegetation dominated by Pinus and accompanied by a number of mesophilous and thermophilous tree taxa, whose composition supports a tentative correlation with Marine Oxygen Isotope Stage 17. The new pollen record from Torre Mucchia improves our understanding of the vegetation development in the Italian Peninsula during the Middle Pleistocene and sheds new light on the role played by the most marked glacial periods in determining the history of tree taxa.

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