Aquatic botany Research Papers - Academia.edu (original) (raw)
- by Alan Law and +1
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- Plant Biology, Aquatic botany, Herbivory, Richness
Highly reducing sediments are prevalent in seagrass environments. Under anoxic conditions, hydrogen sulfide can accumulate as an end product of anaerobic respiration at levels which may be toxic to halophytes. The photosynthetic response... more
Highly reducing sediments are prevalent in seagrass environments. Under anoxic conditions, hydrogen sulfide can accumulate as an end product of anaerobic respiration at levels which may be toxic to halophytes. The photosynthetic response of Zostera marina L. (eelgrass) to manipulations in sediment sulfide concentration and light regimes was examined in Chincoteague Bay in June 1991. Neutral density screens were used in a mesocosm experiment to decrease downwelling irradiance to 50 and 15% of insolation. Sediment sulfide levels were enriched using Na2S and lowered using FeSO4. Photosynthesis vs. irradiance (PI) relationships were determined experimentally at ten light levels throughout the 21 day experiment. Photoadaptation was detected in response to the previous 4 day light history of the plants, as maximum photosynthesis (Pmax) decreased in response to lower daily light levels. Negative impacts of sulfide on eelgrass in this study were observed through reductions in Pmax, increases in the light intensity at which gross photosynthesis equals respiration, and decreases in the initial slope of the PI curve. The effects of eutrophication through reduced light and increased sediment sulfide on Pmax were additive. Elevated sediment sulfide levels may contribute to seagrass loss in stressed areas as the potential for utilization of available light is reduced.
- by Donald Les and +1
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- Plant Biology, Aquatic botany, Image Analysis, Aquatic Macrophytes
A variety of chemicals including foaming agents are used to aid in the protection of forest resources from the wild land fires. The fire-fighting foams (FFFs) are formulations composed principally of surfactants. As a part of Japanese... more
A variety of chemicals including foaming agents are used to aid in the protection of forest resources from the wild land fires. The fire-fighting foams (FFFs) are formulations composed principally of surfactants. As a part of Japanese national project, environmentally inert FFFs have been developed. There is an emerging need for testing the impacts of these FFFs on the living organisms composing the typical landscapes or ecosystems in Japan. In the present report, we aimed to describe our latest attempt for assessing both the short-tem and long-term impacts of FFFs in aquatic (fresh water) and semi-aquatic (wetland) ecosystems , by employing the laboratory-sized model assays (preliminary studies) and the biotope-based observation, respectively. In the biotope assays which was based on the observation in compact biotopes mimicking the fresh water environments and wetland, both the acute and long-term eco-toxic impacts of two FFFs (soap-based and synthetic detergent-based) were assessed. Spraying of synthetic detergent-based foam formula was shown to be more toxic compared to soap-based formula and mock water treatment.
Eutrophication degrades numerous estuaries worldwide and a myriad of assessment metrics have been developed. Here, we apply an example of a previously developed metric (Lee et al., 2004) designed to indicate incipient estuarine... more
Eutrophication degrades numerous estuaries worldwide and a myriad of assessment metrics have been developed. Here, we apply an example of a previously developed metric (Lee et al., 2004) designed to indicate incipient estuarine eutrophication to validate this technique in an already eutrophic estuary end-member, Barnegat Bay–Little Egg Harbor, New Jersey. The metric, termed ‘Nutrient Pollution Indicator’ (NPI) uses eelgrass (Zostera
- by Michael Kennish and +1
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- Plant Biology, Aquatic botany, New Jersey, Nitrogen
- by Paul Erftemeijer and +1
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- Plant Biology, Aquatic botany, Leaf Area Index, Water Use
- by Charles Boylen and +1
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- Plant Biology, Aquatic botany, Seed germination, Aquatic Plants
this article is about all Ultimate Guide to Marimo Moss Balls. In this article talks all about keeping, cultivating, carrying and tips of marimo moss balls in the freshwater tank. Please visit our site aquascaper.org for more information... more
this article is about all Ultimate Guide to Marimo Moss Balls. In this article talks all about keeping, cultivating, carrying and tips of marimo moss balls in the freshwater tank. Please visit our site aquascaper.org for more information about aquarium moss plants
- by Robert Twilley and +1
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- Climate Change, Plant Biology, Aquatic botany, Sea level rise
- by Colin Field and +2
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- Climate Change, Plant Biology, Aquatic botany, Adaptation
The authors of this edition propose a novel and inspiring research approach to the subject of plants, which – being a form of life that is different, yet akin to us – is a constant source of nourishment and metaphors, decoration and... more
The authors of this edition propose a novel and inspiring research approach to the subject of plants, which – being a form of life that is different, yet akin to us – is a constant source of nourishment and metaphors, decoration and obsessions. The articles included in this thematic block on plants enter into lively ongoing debates on genetics, feminism, ecology and plant ontology. They are excellent examples of the fact that in Polish philosophical and cultural reflection there was an understanding very early on of the challenges that posthumanism poses to our anthropocentric intellectual habits. Foreign readers will recognize in these Polish reflections a bold willingness to ask ethical and aesthetic questions of great relevance to the modern world that go far beyond the safe, though most likely imagined, limits of what it is to be human.
Mangroves are defined by the presence of trees that mainly occur in the intertidal zone, between land and sea, in the (sub) tropics. The intertidal zone is characterised by highly variable environmental factors, such as temperature,... more
Mangroves are defined by the presence of trees that mainly occur in the intertidal zone, between land and sea, in the (sub) tropics. The intertidal zone is characterised by highly variable environmental factors, such as temperature, sedimentation and tidal currents. The aerial roots of mangroves partly stabilise this environment and provide a substratum on which many species of plants and
- by Ken Krauss and +1
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- Climate Change, Carbon Dioxide, Plant Biology, Aquatic botany
Η υδροθεραπεία και το θεραπευτικό κολύμπι εφαρμοζόταν μέσω της αρχαίας ελληνικής θρησκείας στο πλαίσιο της λαϊκής θρησκευτικής παράδοσης, εδώ αναφέρεται ενδεικτικά η λατρεία της Αφροδίτης. Στη ρωμαϊκή εποχή εμφανίζονται στη βόρεια Ευρώπη... more
Η υδροθεραπεία και το θεραπευτικό κολύμπι εφαρμοζόταν μέσω της αρχαίας ελληνικής θρησκείας στο πλαίσιο της λαϊκής θρησκευτικής παράδοσης, εδώ αναφέρεται ενδεικτικά η λατρεία της Αφροδίτης. Στη ρωμαϊκή εποχή εμφανίζονται στη βόρεια Ευρώπη τα λουτρά της Ντιάνα, στη κεντρική Ευρώπη τα θερμά λουτρά της Αρτέμιδος. Ωστόσο, η υδροθεραπεία αποτελεί σήμερα ένα νέο σχετικά άγνωστο αντικείμενο για την επιστημονική κοινότητα με έντονη επιρροή από ανατολικά φιλοσοφικά δόγματα στα σύγχρονα υδροθεραπευτικά συστήματα, όπως το Watsu και το Ai chi. Δεν έχει δημοσιευθεί μια ιστορική μελέτη για την υδροθεραπεία-θεραπευτική άσκηση στο νερό στα αρχαία ελληνιστικά χρόνια και την μετέπειτα εξέλιξη της στον ευρωπαϊκό πολιτισμό, καθώς τότε θα εμφανιζόταν στο προσκήνιο ένα νέο μοντέλο ολιστικής υδροθεραπείας. Στη παρούσα έρευνα αναδείχθηκε η ύπαρξη της θεραπευτικής κολύμβησης και της υδροθεραπείας ως ένα καθημερινό μέσο θεραπείας του ανθρώπου άρρηκτα συνδεδεμένο με τη θρησκευτική παράδοση.