FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W35545438> ?p ?o ?g. }

• W35545438 abstract "This thesis is an explanation of the characteristics of thenmangrove vegetation of Moreton Bay, southeastern Queensland.nWhile earlier studies provided some detail of floristics,nstructure and distribution of the vegetation, no previousnattempt has been made to understand existing patterns in termsnof the physical, geomorphological and biological processesnwhich have shaped the intertidal environments and whichnregulate the relationships between the plants, plantncommunities and their habitats. The research was conducted atnthree levels of ecological organisation.n At the first level, defined as the mangrove vegetation-edaphic complex, features of the climate and the geomorphology of thenregion were reviewed, and 12 small-scale landform types, termednTopographic Units, were identified. The characteristics andndistribution of these Units were related to the geomorphicnprocesses of shoreline progradation, erosion and stability.nThe significance of allogenic change to the coastal fringingnvegetation was illustrated in a detailed study of landwardnencroachment of mangroves at Cabby Cabby Island in southernnMoreton Bay.n Studies at the level of the ecosystem were centred at MudnIsland, which represented a relatively stable Topographic Unitnwhere external geomorphic change is not a significant factor.nHere plant communities could be assumed to have reached anclimax in relation to the prevailing edaphic conditions. FournAvicennia marina-dominated plant formations were identified onnMud Island using the structural criteria of life form andnfoliage projective cover (FPC). These formations represent thenrange of structural variation assumed by Avicennia marina innMoreton Bay. Because low-closed forests occur in two distinctnedaphic situations this formation was regarded as two plantncommunities. Each of the remaining plant formations is representednby a single plant community. Comparative studies of thenstructural, physiognomic and floristic attributes of each plantncommunity and analysis of the edaphic conditions of theirnhabitats were undertaken.n The plant communities are related to distinct habitats andntheir evolution on Mud Island was reviewed. With the exceptionnof the low shrubland, which was found under specific andnunusual edaphic conditions, a definite pattern of structuralnvariation emerged. Canopy height decreases from a maximum ofn9.0 m between mean sea level ( M.S.L. ) and mean high water neapn( M.H.W.N. ) tide level to about 2.0 m at an elevation of 2.4 m.nWhile there is some reduction in FPC across this intertidalnrange the canopy remains essentially closed. Beyond thenelevation of 2.4 m there is a marked change in growth habitnfrom single-stemmed to predominantly multi-stemmed shrubs andnan reduction in FPC to an open canopy. Soil water potentialsn(PnWn) at this point are between -3.5 and -4.5 MPa.n The most important environmental gradient associated with thesenvegetation changes is the decline in P W due to increasingnosmotic concentration. Soil water availability does not varynsignificantly below mean high water neap tide level ( M.H.W.N. )nthrough the year; but seasonally extreme values were measurednin the communities above this level. No evidence was found fornnutrient deficiencies but further more detailed investigationsnare recommended.n At the individual level the relationships between the plantsnwithin each community and the environment were examined byncomparing seasonal shoot and stem growth, litter production andnreproductive responses in each community to the prevailingnenvironmental conditions. Where soil water availability is notnlimiting, optimal growth rates were obtained between about 18dnand 24d C mean daily air temperature. In communities whichnreceive a daily tidal inundation a bi-modal annual growthnrhythm was observed with peaks in spring and autumn. At tidalnlevels above M.H.W.N., growth peaks in spring are suppressednand viable propagules are not produced unless average to highnspring rainfall occurs. Measurements of total annual shootngrowth based in harvested shoots supported these results.nAssociation between shoot growth and measured PnWnduring thengrowth period suggested that growth is reduced markedly atnvalues of PnWnless than -3.0 MPa.n Leaf litter production rates reflected the patterns of shootnextension growth. Total litter production in the seaward lownclosed-forest was estimated at 6.42 t ha-1 yr-1. This compared with 3.4 t ha-1 yr-1 for the closed-scrub and 1.94nt ha-1 yr-1 for the low open-shrubland.n Ecophysiological measurements examined the seasonal variationnin mid-day Pn1 and diurnal variations in Pn1 and leafnconductance (gs) in response to a gradient of decreasingnPnW. Optimal growth responses on Mud Island, obtained in thenseaward low closed-forest, were associated with a mean mid-daynPn1 of about -4.0 MPa, 1.5 to 2.0 MPa lower than ambient soilnpotentials. In contrast, seasonal extremes as low as -7 to -8nMPa were recorded in the low open-shrubland. Maximum values forngs of 0.45 cm sec-1 occurred at mid-day in plants wherenWnwas less than 50% sea water concentration. This reducednto 0.34 cm sec-1nin sites with PnW about as high as that ofnsea water where peak values occurred at mid -morning. Furthernreductions occurred at higher soil salinities, but stoma werenalways at least partially open throughout the day and somentranspiration was also observed before dawn and after dusk. Itnwas concluded that Avicennia marina could not be regarded as anxerophyte as had previously been suggested in the literature,nbut was dependent on a continuing supply of water. Theoreticalnreasons in support of this view are presented.n Knowledge of these ecophysiological aspects of the plant-environmentnrelationships enabled an explanation of thenvariation in seasonality and rates of growth and reproductionnobserved in the species. This information in turn clarified thenprocesses of colonisation and community development. It wasntherefore possible to interpret the significance of edaphic,ngeomorphological and biotic influences on the current patternsnof vegetation within the intertidal areas of Moreton Bay andnthe processes of change which have effected them.n These topics have been argued in the final discussion of thisnthesis to answer questions of the determination of ecologicalndominance; structural variation in the mangrove plant communitiesnand the meaning of this variation for total litternproduction; and succession and change in the mangrovenvegetation-edaphic complex. Finally the theoretical nature ofnmulti-level ecological analysis is reviewed in relation to thenobjectives of this research.n" @default.
• W35545438 created "2016-06-24" @default.
• W35545438 creator A5060736530 @default.
• W35545438 date "1983-01-01" @default.
• W35545438 modified "2023-09-24" @default.
• W35545438 title "Pattern and process in the mangrove ecosystems of Moreton Bay, Southeastern Queensland" @default.
• W35545438 hasPublicationYear "1983" @default.
• W35545438 type Work @default.
• W35545438 sameAs 35545438 @default.
• W35545438 citedByCount "1" @default.
• W35545438 crossrefType "journal-article" @default.
• W35545438 hasAuthorship W35545438A5060736530 @default.
• W35545438 hasConcept C100970517 @default.
• W35545438 hasConcept C107394435 @default.
• W35545438 hasConcept C108497213 @default.
• W35545438 hasConcept C110872660 @default.
• W35545438 hasConcept C111368507 @default.
• W35545438 hasConcept C115880899 @default.
• W35545438 hasConcept C127313418 @default.
• W35545438 hasConcept C142724271 @default.
• W35545438 hasConcept C150117547 @default.
• W35545438 hasConcept C152382732 @default.
• W35545438 hasConcept C159750122 @default.
• W35545438 hasConcept C166957645 @default.
• W35545438 hasConcept C174580923 @default.
• W35545438 hasConcept C185933670 @default.
• W35545438 hasConcept C18903297 @default.
• W35545438 hasConcept C205649164 @default.
• W35545438 hasConcept C2776133958 @default.
• W35545438 hasConcept C32120771 @default.
• W35545438 hasConcept C53002841 @default.
• W35545438 hasConcept C58640448 @default.
• W35545438 hasConcept C68874143 @default.
• W35545438 hasConcept C69661492 @default.
• W35545438 hasConcept C71908930 @default.
• W35545438 hasConcept C71924100 @default.
• W35545438 hasConcept C86803240 @default.
• W35545438 hasConceptScore W35545438C100970517 @default.
• W35545438 hasConceptScore W35545438C107394435 @default.
• W35545438 hasConceptScore W35545438C108497213 @default.
• W35545438 hasConceptScore W35545438C110872660 @default.
• W35545438 hasConceptScore W35545438C111368507 @default.
• W35545438 hasConceptScore W35545438C115880899 @default.
• W35545438 hasConceptScore W35545438C127313418 @default.
• W35545438 hasConceptScore W35545438C142724271 @default.
• W35545438 hasConceptScore W35545438C150117547 @default.
• W35545438 hasConceptScore W35545438C152382732 @default.
• W35545438 hasConceptScore W35545438C159750122 @default.
• W35545438 hasConceptScore W35545438C166957645 @default.
• W35545438 hasConceptScore W35545438C174580923 @default.
• W35545438 hasConceptScore W35545438C185933670 @default.
• W35545438 hasConceptScore W35545438C18903297 @default.
• W35545438 hasConceptScore W35545438C205649164 @default.
• W35545438 hasConceptScore W35545438C2776133958 @default.
• W35545438 hasConceptScore W35545438C32120771 @default.
• W35545438 hasConceptScore W35545438C53002841 @default.
• W35545438 hasConceptScore W35545438C58640448 @default.
• W35545438 hasConceptScore W35545438C68874143 @default.
• W35545438 hasConceptScore W35545438C69661492 @default.
• W35545438 hasConceptScore W35545438C71908930 @default.
• W35545438 hasConceptScore W35545438C71924100 @default.
• W35545438 hasConceptScore W35545438C86803240 @default.
• W35545438 hasLocation W355454381 @default.
• W35545438 hasOpenAccess W35545438 @default.
• W35545438 hasPrimaryLocation W355454381 @default.
• W35545438 hasRelatedWork W102099341 @default.
• W35545438 hasRelatedWork W1695824278 @default.
• W35545438 hasRelatedWork W1991214486 @default.
• W35545438 hasRelatedWork W2004221761 @default.
• W35545438 hasRelatedWork W2033555154 @default.
• W35545438 hasRelatedWork W2038195397 @default.
• W35545438 hasRelatedWork W2042941855 @default.
• W35545438 hasRelatedWork W2079671954 @default.
• W35545438 hasRelatedWork W2125498080 @default.
• W35545438 hasRelatedWork W2154699226 @default.
• W35545438 hasRelatedWork W2194542715 @default.
• W35545438 hasRelatedWork W2304469693 @default.
• W35545438 hasRelatedWork W2360651235 @default.
• W35545438 hasRelatedWork W2550169694 @default.
• W35545438 hasRelatedWork W2800501623 @default.
• W35545438 hasRelatedWork W2946162303 @default.
• W35545438 hasRelatedWork W2998295809 @default.
• W35545438 hasRelatedWork W303883342 @default.
• W35545438 hasRelatedWork W3186926646 @default.
• W35545438 hasRelatedWork W2495901639 @default.
• W35545438 isParatext "false" @default.
• W35545438 isRetracted "false" @default.
• W35545438 magId "35545438" @default.
• W35545438 workType "article" @default.