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Journal articles on the topic "Melaleuca quinquenervia":
1
Laroche, François B. "Managing Melaleuca (Melaleuca quinquenervia) in the Everglades." Weed Technology 12, no. 4 (December 1998): 726–32. http://dx.doi.org/10.1017/s0890037x00044626.
Until recently melaleuca was spreading at a rate faster than it was being controlled throughout the boundaries of the South Florida Water Management District (District). Although melaleuca is a difficult species to eradicate, apparently District efforts, along with those of other governmental agencies and private groups, are containing its spread within the Everglades Water Conservation Areas (WCAs) and the marsh of Lake Okeechobee. Melaleuca has been completely cleared from WCA-2A, -3B, and -3A, south of Alligator Alley. These areas are now under “maintenance control.” Maintenance control means applying management techniques in a continuous basis to keep an invasive plant population at its lowest feasible level. Today, the melaleuca infestation is no longer increasing; in many areas, it is being reduced. Preliminary results from the latest District survey indicate melaleuca infestation has decreased considerably in South Florida, especially in public lands. The intent of this paper is to provide an assessment of progress made by the District's melaleuca control program over the past 7 yr.
2
El-Toumy, S. A. A., M. S. Marzouk, F. A. Moharram, and E. A. Aboutabl. "ChemInform Abstract: Flavonoids of Melaleuca quinquenervia." ChemInform 32, no. 17 (April 24, 2001): no. http://dx.doi.org/10.1002/chin.200117207.
Rayachhetry, Min B., and M. L. Elliott. "Evaluation of Fungus-Chemical Compatibility for Melaleuca (Melaleuca quinquenervia) Control." Weed Technology 11, no. 1 (March 1997): 64–69. http://dx.doi.org/10.1017/s0890037x0004135x.
Integration of a fungal pathogen with herbicides may enhance melaleuca control efforts in South Florida. Hyphal inoculum of fourBotryosphaeria ribisGross & Duggar isolates were evaluated in vitro for compatibility with imazapyr, glyphosate, and a surfactant. Imazapyr at 12 to 60 mg ai/ml did not cause significant loss of inoculum viability in all four isolates within 2 h after mixing. After 24 h, inoculum viability of isolate BR-4 remained unchanged at these imazapyr concentrations, but viability of BR-1 through BR-3 was reduced. Glyphosate at the lowest concentration (32 mg ai/ml) significantly reduced inoculum viability of all isolates within 2 h. Initially, the inoculum viability of all isolates remained unaffected by 1, 5, and 10% (v/v) surfactant concentrations. After 24 h, the surfactant reduced inoculum viability of BR-2, BR-3, and BR-4 inconsistently between experiments, while the inoculum viability of BR-1 was reduced significantly at all concentrations. Mixing of the lowest concentrations of imazapyr, glyphosate, and surfactant significantly reduced inoculum viability within 2 h. This corresponded to the results obtained for glyphosate alone. These results show that hyphal inoculum ofB. ribismay be mixed with imazapyr and surfactant for field applications, but mixing the fungus with glyphosate may not be as efficacious.
4
Johnston, S. G., P. G. Slavich, and P. Hirst. "Alteration of groundwater and sediment geochemistry in a sulfidic backswamp due to Melaleuca quinquenervia encroachment." Soil Research 41, no. 7 (2003): 1343. http://dx.doi.org/10.1071/sr03027.
Extensive encroachment of the native tree species Melaleuca quinquenervia (Cav.) Blake has occurred on a coastal floodplain sulfidic backswamp in eastern Australia. Almost 50% of the open swamp area c. 1870 is now monospecific M. quinquenervia forest. Encroachment has been associated with shortened hydroperiods and land management changes following drainage for agriculture. Large differences to shallow groundwater and sediment geochemistry were observed beneath both individual M. quinquenervia trees and encroaching forests compared to open swamp. Groundwater beneath M. quinquenervia had enhanced titratable acidity and acidic metal cations, increased concentrations of other ionic species (Cl–, SO42–), altered ionic ratios, and increased dissolved organic carbon. Soil beneath M. quinquenervia displayed enhanced accumulation of acidity and soluble ions, with concentration profiles suggesting vertical redistribution towards the surface. Deepening of the sulfide oxidation front in the soil beneath encroached M. quinquenervia suggests that enhanced sulfide oxidation may be occurring. Changes in soil pH, redox potential, and Fe mineral precipitation/dissolution were also evident. These changes appear to be the result of interactions between M. quinquenervia physiology and the unique groundwater and sediment geochemistry of the surrounding sulfidic/sulfuric horizons. Mechanisms to explain the observed changes are discussed along with potential management implications.
5
Lockhart, Christine S. "Aquatic heterophylly as a survival strategy in Melaleuca quinquenervia (Myrtaceae)." Canadian Journal of Botany 74, no. 2 (February 1, 1996): 243–46. http://dx.doi.org/10.1139/b96-029.
The broad-leaf paper bark or melaleuca tree (Melaleuca quinquenervia (Cav.) Blake) is an emergent, semiaquatic tree whose morphological plasticity allows it to invade wetland and terrestrial habitats. While studying the effect of hydroperiod on melaleuca seedlings, two types of aquatic leaf forms were observed under submersed conditions. Linear leaves developed at least 9.5 cm below the water surface and were associated with short internodes. Short, broad, incurved transitional leaves formed as the seedlings approached the water surface. Aerial leaves were flat and spatulate to oblanceolate. Leaf length to width ratios, stomatal density, and shoot internode lengths were significantly different between the three leaf forms. Characteristics of submersed melaleuca seedlings are similar to those of other aquatic heterophyllic plants that grow in areas where water levels fluctuate. An increased understanding of morphological variations of this invasive tree may lead to additional control methods and mechanisms. Keywords: Melaleuca, aquatic, heterophylly.
6
Grover, DR, and PJ Slater. "Conservation Value to Birds of Remnants of Melaleuca Forest in Suburban Brisbane." Wildlife Research 21, no. 4 (1994): 433. http://dx.doi.org/10.1071/wr9940433.
The bird species composition of nine remnants of Melaleuca quinquenervia forest in NE Brisbane, Queensland, was censused from March 1992 to March 1993 to investigate the effect of forest fragmentation and fragment characteristics. Remnant area was a correlated with the total number of bird species and the number of raptors occurring, while understorey vegetation density was related to the number of forest and understorey bird species. The species composition of the M. quinquenervia remnants was compared with that of the Cooloola National Park and with that of eucalypt [Eucalyptus] remnants in lowland SE Queensland. Even the small M. quinquenervia remnants around Brisbane play an important role in conserving the avian fauna of the region by providing habitat and refuges for migrant, nesting, locally rate and uncommon species, and species not commonly found in other forest types. Future recommended management involves the maintenance of size, habitat diversity and understorey vegetation density, the prevention of disturbance and the preservation of swampy areas and ponds.
7
Rojas-Rodríguez, Freddy, and Gustavo Torres-Córdoba. "Árboles del Valle Central de Costa Rica: reproducción Corcho (Melaleuca quinquenervia (Cav.) S.T. Blake.)." Revista Forestal Mesoamericana Kurú 12, no. 29 (June 22, 2015): 80. http://dx.doi.org/10.18845/rfmk.v12i29.2259.
Se presenta una breve descripción del árbol corcho (Melaleuca quinquenervia (Cav.) S.T. Blake.), incluyendo información sobre fenología como base para la recolección de frutos, el manejo de las semillas, la viverización y el proceso de germinación. (Cav.) S.T. Blake.
8
Center, Ted D., Matthew F. Purcell, Paul D. Pratt, Min B. Rayamajhi, Philip W. Tipping, Susan A. Wright, and F. Allen Dray. "Biological control of Melaleuca quinquenervia: an Everglades invader." BioControl 57, no. 2 (July 29, 2011): 151–65. http://dx.doi.org/10.1007/s10526-011-9390-6.
Bolton, Keith G. E., and Margaret Greenway. "Nutrient Sinks in a Constructed Melaleuca Wetland Receiving Secondary Treated Effluent." Water Science and Technology 40, no. 3 (August 1, 1999): 341–47. http://dx.doi.org/10.2166/wst.1999.0180.
This study examined N, P and K partitioning in the sinks of a 130 m2 constructed Melaleuca wetland after receiving secondary treated sewage effluent for 21 months. The sinks examined were: 1) biomass, which was further partitioned into the harvestable above ground portion and the roots; 2) sediment; 3) gravel and; 4) the clay base. Gravel was the major nutrient storage sink, however this was a function of the high gravel particle mass (525 kg m−2) rather than high nutrient concentrations. M. alternifolia trees had the highest biomass due to high growth rates, higher planting densities, and low litterfall. M. quinquenervia trees were severely attacked by a sap sucking Heteropteron (Eucerocoris. suspectus) which stunted growth, but resulted in a cumulative litterfall mass three times that of the M. alternifolia trees. The sediment sink was strongly influenced by litterfall, with the sediment sink in the M. quinquenervia terraces storing more than twice the nutrients in the sediment sink of the M. alternifolia terraces. Because of their higher grwoth rates and above ground biomass fraction, and their potential to produce tea tree oil, M. alternifolia is most suitable for constructed wetlands incorporating a harvesting regime. Because of their high rate of transfer from the biomass to sediment sink via litterfall, M. quinquenervia is more suited to non-harvested constructed wetlands.
10
Martins, C. C., M. R. R. Pereira, and S. R. Marchi. "Germinação de sementes de Melaleuca quinquenervia em condições de estresse hídrico e salino." Planta Daninha 29, no. 1 (March 2011): 1–6. http://dx.doi.org/10.1590/s0100-83582011000100001.
O comportamento invasivo de Melaleuca quinquenervia em áreas úmidas deve-se à sua estratégia de regeneração agressiva, que está alicerçada na produção de sementes em massa. O conhecimento da fisiologia da germinação de sementes de plantas daninhas pode contribuir significativamente para o desenvolvimento de estratégias de manejo. O objetivo deste trabalho foi avaliar os possíveis efeitos dos estresses hídrico e salino na germinação de sementes de M. quinquenervia. A semeadura foi realizada com quatro repetições de 0,05 g de sementes em papel umedecido com soluções nos potenciais osmóticos de 0,0; -0,2; -0,4; e -0,8 MPa, induzidos com polietilenoglicol (PEG 6000) e NaCl. O teste de germinação foi conduzido a 25 ºC na presença de luz. Avaliou-se a primeira contagem do teste aos sete dias após a semeadura e, semanalmente, a germinação (plântulas normais) até os 28 dias. Foi calculado o índice de velocidade de germinação. A análise dos resultados permitiu a conclusão de que o estresse hídrico acarreta maior redução na velocidade de germinação e na germinação acumulada de sementes de M. quinquenervia do que o estresse salino e, independentemente da substância utilizada para indução do estresse, o limite para germinação está entre -0,4 e -0,8MPa.
Martin, Melissa R. "Alteration of ecosystem nutrient pools and microbial communities after invasion of Melaleuca quinquenervia." [Gainesville, Fla.] : University of Florida, 2006. http://purl.fcla.edu/fcla/etd/UFE0014418.
Sevillano, Garcia Mayeya Lucero. "The Effects of Biological Control Agents on Population Growth and Spread of Melaleuca quinquenervia." Scholarly Repository, 2010. http://scholarlyrepository.miami.edu/oa_dissertations/406.
The main goal of this study was to evaluate the effectiveness of two biological control agents in reducing population growth and spread of the invasive tree Melaleuca quinquenervia, a subtropical tree native to Australia, and invasive in Florida, Puerto Rico, and the Bahamas. While in Florida two insects Oxyops vitiosa (weevil), and Boreioglycaspis melaleucae (psyllid) have been established as biocontrol agents, in Puerto Rico only psyllids are present, and in the Bahamas no biocontrol agents are present. This study combined demographic data, experiments and mathematical models to investigate the influence of the biocontrol agents on M. quinquenervia's spatial population dynamics. In the field, permanent plots were established and demographic data was collected in populations in the native and exotic ranges. Australian populations are comprised mostly of tall adult trees, while in the exotic ranges populations are comprised mostly of short trees (<1.3m in height), and small adult trees. In a shade-house, I performed an experiment to investigate the effects of insect type and density on survival and growth of M. quinquenervia seedlings. I found that high density of insects, independently or in combination, reduce seedling performance, thus having the potential to alter the seedling-short plant transition of the M. quinquenervia life cycle. Based on the demographic data, I developed integral projection models (IPMs) to determine population growth rates in each region. Populations in Australia and the Bahamas are increasing, while populations in Florida and Puerto Rico are decreasing. Population growth is most sensitive to the seedling-short plant transition in all regions, except Florida, where it is most sensitive to survival of tall plants. Simulations combining the results of the IMPs and experiment indicated the biocontrol damage results in reductions in population growth rate in Puerto Rico and the Bahamas. Seed dispersal and demographic data was combined to develop an integrodifference structured model of population spread. Simulations indicated that by reducing seedling performance, insects have the potential to reduce the rate of population spread. Overall this study shows that individual-level effects of biocontrol agents have translated into reductions in population growth rate and rate of spread of M. quinquenervia.
4
Baumann, Anne. "Regeneration of Broad-leaved Paperbark Trees in the Fringing Forest of the Myall Lakes." Thesis, The University of Sydney, 2008. http://hdl.handle.net/2123/8586.
This thesis examines the key requirements of and influences on recruitment of Melaleuca quinquenervia in a narrow, lake-fringe forest habitat within the Myall Lakes National Park. Seed production and dispersal, germination and seedling establishment were investigated and a model was developed for Paperbark recruitment within the fringing forest. Seed viability, seed fall, seed longevity and seedling emergence were examined as was optimum temperature for germination. The requirement for light for germination of M. quinquenervia is demonstrated conclusively in this study. M. quinquenervia seeds are shown to have a high tolerance to salinity levels up to 10 deci Siemens per metre (dS/m). Casuarina leachate was found to have a slight inhibitory effect on Paperbark seedling germination. During January and February of 2006 and 2007, drought conditions, causing all-time low lake levels, provided the optimum conditions for germination. Germination appears to be seasonal, but highly dependent on the provision of a moist, preferably non-saline microsite. Survival and mortality of several natural seedling populations at lake foreshore sites was monitored. The seedling establishment stage was shown to be the most limiting process in the recruitment cycle and previous suggestions of recruitment being episodic are confirmed. Hence, protection of the foreshore areas where young seedlings are most likely to establish is paramount in order to protect the integrity of the fringing forest, as this study has shown that the chance of seedlings surviving to become juvenile trees is very slim.
5
Trilles, Bénédicte. "Connaissance et valorisation d'une espece a huiles essentielles de nouvelle-caledonie - melaleuca quinquenervia (le niaouli)." Nouvelle Calédonie, 1999. http://www.theses.fr/1999NCAL0001.
Le melaleuca quinquenervia, niaouli, existe en nouvelle-caledonie sous une seule forme botanique : la forme sauvage. Le rendement de production en huiles essentielles ne depasse pas les 0,7%. L'evaluation des potentialites en huiles essentielles des feuilles de 150 sujets etudies montre clairement que le rendement en essences peut etre compris entre 0. 01% et 3. 1%. Le rendement en huiles essentielles est affecte par la phenologie de l'arbre. Les arbres etudies ont ete classes en six categories de producteurs. La nature du sol affecte peu la capacite d'expression genetique de chaque individu. Le rendement augmente nettement avec la frequence des glandes secretrices selon une courbe logarithmique. Le statut metabolique des feuilles constitue un facteur important dans le remplissage de ces glandes. L'etude de la variabilite de la composition chimique par cg et cg/sm nous a amene a classer les huiles essentielles de niaouli de nouvelle-caledonie en six chimiotypes. Le constituant majoritaire de la fraction sesquiterpenole des sujets etudies, isole puis identifie par rmn a revele sans ambiguite le ledol. Afin de mieux apprehender l'origine de cette variabilite intraspecifique de nos six chimiotypes, la tentative du polymorphisme enzymatique n'a cependant pas permis de correler deux des chimiotypes testes avec leur contenu enzymatique. La remarquable activite bactericide, variable, tant au point de vue selectivite que puissance, avec une activite plus forte des extraits des jeunes feuilles, a ete clairement demontree. Meme si le niaouli est considere comme recalcitrant a la multiplication vegetative, un mode de multiplication vegetative a ete mis au point. Le suivi des jeunes chimiotypes en parcelle d'experimentation a permis de mieux apprehender leurs exigences en conditions naturelles. L'ensemble des resultats obtenus devrait servir de base pour une meilleure exploitation des chimiotypes a forte valeur ajoutee visant une redynamisation du secteur niaouli en nouvelle-caledonie.
6
Velez, Thelma I. "Measuring the Impact of Melaleuca quinquenervia Biochar Application on Soil Quality, Plant Growth, and Microbial Gas Flux." FIU Digital Commons, 2012. http://digitalcommons.fiu.edu/etd/775.
Biochar has been heralded a mechanism for carbon sequestration and an ideal amendment for improving soil quality. Melaleuca quinquenervia is an aggressive and wide-spread invasive species in Florida. The purpose of this research was to convert M. quinquenervia biomass into biochar and measure how application at two rates (2% or 5% wt/wt) impacts soil quality, plant growth, and microbial gas flux in a greenhouse experiment using Phaseolus vulgaris L. and local soil.
Plant growth was measured using height, biomass weight, specific leaf area, and root-shoot ratio. Soil quality was evaluated according to nutrient content and water holding capacity. Microbial respiration, as carbon dioxide (CO2), was measured using gas chromatography. Biochar addition at 5% significantly reduced available soil nutrients, while 2% biochar application increased almost all nutrients. Plant biomass was highest in the control group, p2 flux decreased significantly in both biochar groups, but reductions were not long term.
7
Rowley, Maxine Joy, of Western Sydney Hawkesbury University, and Faculty of Science and Technology. "Spatial distribution of phosphorus in the sediments of a constructed wetland receiving treated sewage effluent." THESIS_FST_XXX_Rowley_M.xml, 1998. http://handle.uws.edu.au:8081/1959.7/403.
The Byron Bay Sewage Treatment work consists of a conventional treatment system discharging into an 8 ha wetland. The wetland was constructed around the dune and swale remnants of a coastal beach ridge formation. The wetland design incorporated stands of broad leaf paperback, Melaleuca quinquenervia , in two distinct Sections, separated by, and each preceded by, open water Sections fringed by predominantly emergent macrophytes. Spatial and temporal patterns in sediment phosphorus concentrations were examined using sediment cores. Core consisted of three main sediment types - surface organic accumulation, pre-existing organic layers and sand. Results suggest that the design and management of wetland systems should be aimed at maximising the deposition of sediment (and associated phosphorus) and minimising subsequent phosphorus release from the sediment. This might be achieved through the removal of accumulated organic sediments to retain the phosphorus adsorption capacity of the system, consideration of wind direction during periods of high (floating) plant growth (as detritus may accumulate along the up-wind edges of the wetland), incorporation of deep zones to minimise sediment phosphorus release and the inclusion of stands of M. quinquenervia. Results highlight pitfalls in the prevailing approach to wetland design, which ignore the complex functions which occur in natural wetland systems. A more holistic approach incorporating a high diversity of ecozones in wetland design is proposed, in effect mimicking natural systems. Master of Science (Hons)
8
Zoete, Toivo. "Conservation of wetland functions in an environment of regional growth and change : melaleuca quinquenervia in the Moreton region of South-East Queensland." Thesis, Queensland University of Technology, 1997.
Dray, F. Allen Jr. "Ecological genetics of Melaleuca quinquenervia (Myrtaceae) : population variation in Florida and its influence on performance of the biological control agent Oxyops vitiosa (Coleoptera: Curculionidae)." FIU Digital Commons, 2003. http://digitalcommons.fiu.edu/etd/3085.
Melaleuca quinquenervia (Cav.) Blake (Myrtaceae) was imported into Florida from Australia over a century ago as a landscape plant. A favorable climate and periodic wildfires helped M. quinquenervia thrive; it now occupies about 200,000 hectares in southern Florida. A biological control (i.e., biocontrol) program against M. quinquenervia has been initiated, but not all biocontrol releases are successful. Some scientists have argued that poor biocontrol agent success may relate to genetic differences among populations of invasive weeds. I tested this premise by determining (1) the number and origins of M. quinquenervia introductions into Florida, (2) whether multiple introduction events resulted in the partitioning of Florida's M. quinquenervia populations into discrete biotypes, and (3) whether Oxyops vitiosa, an Australia snout beetle imported to control this weed, might discriminate among putative M. quinquenervia biotypes. Careful scrutiny of early horticultural catalogs and USDA plant introduction records suggested at least six distinct introduction events. Allozyme analyses indicated that the pattern of these introductions, and the subsequent redistribution of progeny, has resulted in geographic structuring of the populations in southern Florida. For example, trees on Florida's Gulf Coast had a greater effective number of alleles and exhibited greater heterozygosity than trees on the Atlantic Coast. Essential oil yields from M. quinquenervia leaves followed a similar trend; Gulf Coast trees yielded nearly twice as much oil as Atlantic Coast trees when both were grown in a common garden. These differences were partially explained by the predominance of a chemical phenotype (chemotype) very rich in the sesquiterpene (E)-nerolidol in M. quinquenervia trees from the Gulf Coast, but rich in a mixture of the monoterpene 1, 8-cineole and the sesquiterpene viridiflorol in trees from the Atlantic Coast. Performance of O. vitiosa differed dramatically in laboratory studies depending on the chemotype of the foliage they were fed. Larval survivorship was four-fold greater on the (E)-nerolidol chemotype. Growth was also greater, with adult O. vitiosa gaining nearly 50% more biomass on the (E)- nerolidol plants than on the second chemotype. The results of this study thus confirmed the premise that plant genotype can affect the population dynamics of insects released as weed biocontrols.
10
Rowley, Maxine Joy. "Spatial distribution of phosphorus in the sediments of a constructed wetland receiving treated sewage effluent." Thesis, [Richmond, N.S.W.] : Centre for Water and Environmental Technology, Water Research Laboratory, University of Western Sydney, Hawkesbury, 1998. http://handle.uws.edu.au:8081/1959.7/403.
The Byron Bay Sewage Treatment work consists of a conventional treatment system discharging into an 8 ha wetland. The wetland was constructed around the dune and swale remnants of a coastal beach ridge formation. The wetland design incorporated stands of broad leaf paperback, Melaleuca quinquenervia , in two distinct Sections, separated by, and each preceded by, open water Sections fringed by predominantly emergent macrophytes. Spatial and temporal patterns in sediment phosphorus concentrations were examined using sediment cores. Core consisted of three main sediment types - surface organic accumulation, pre-existing organic layers and sand. Results suggest that the design and management of wetland systems should be aimed at maximising the deposition of sediment (and associated phosphorus) and minimising subsequent phosphorus release from the sediment. This might be achieved through the removal of accumulated organic sediments to retain the phosphorus adsorption capacity of the system, consideration of wind direction during periods of high (floating) plant growth (as detritus may accumulate along the up-wind edges of the wetland), incorporation of deep zones to minimise sediment phosphorus release and the inclusion of stands of M. quinquenervia. Results highlight pitfalls in the prevailing approach to wetland design, which ignore the complex functions which occur in natural wetland systems. A more holistic approach incorporating a high diversity of ecozones in wetland design is proposed, in effect mimicking natural systems.
Books on the topic "Melaleuca quinquenervia":
1
O'Hare, Nancy K. Wildlife in southern Everglades wetlands invaded by melaleuca (Melaleuca quinquenervia). Gainesville, FL: Florida Museum of Natural History, 1997.
"The Biology, Distribution, and Ecological Consequences of Melaleuca quinquenervia in the Everglades." In Everglades, 357–72. CRC Press, 1994. http://dx.doi.org/10.1201/9781466571754-22.
