Assessment of Growth Response and Patterns of Biomass Allocation by Panicum hemitomon Schultes: Implications for Thick-mat Floating Marsh Creation and Restoration

I carried out several large, manipulative greenhouse and controlled-setting experiments to elucidate Panicum hemitomon growth response as influenced by environmental conditions associated with restoring thick-mat floating marsh. Initially, Panicum hemitomon growth response was assessed in conjunction with manipulated nutrient availability and hydrology. Next, I assessed Panicum hemitomon growth response in conjunction with a suite of substrate and mat or containment materials. Finally, I evaluated Panicum hemitomon growth response, as well as overall created floating marsh vegetated development, using both a multi-species planting approach and a suite of Panicum hemitomon establishment techniques. All partitions of Panicum hemitomon biomass (shoot, rhizome, and root material) were enhanced under nitrogen, and to a lesser extent, phosphorous enrichment. Saturated (not inundated) hydrologic conditions were most conducive for robust growth by all partitions of Panicum hemitomon biomass. Substrate and mat or containment materials had a significant effect on Panicum hemitomon vigor, with peat and peat-containing blended substrate materials being most conducive for vigorous Panicum hemitomon growth. Duralast coconut fiber was the most suitable mat or containment material based not only on measures of plant vigor, but also for reasons associated with strength and stability, as well as buoyancy. The combination of Panicum hemitomon and Ludwigia peploides was superior to any other multi-species treatment tested. Ludwigia peploides was highly resilient to transplanting, grew vigorously in a lateral fashion, produced significantly more biomass than any other secondary species, and enhanced overall mat buoyancy, all key metrics regarding successful floating marsh restoration. Equally as important, the large amount of biomass attained by Ludwigia peploides was not totally at the expense of vigorous Panicum hemitomon growth. With respect to establishment technique, the positive response of Panicum hemitomon rhizome growth to humic acid amendment warrants further study. This research generated data that not only advance the body of general ecological knowledge pertaining to Panicum hemitomon, the dominant macrophyte of thick-mat floating marsh, but equally as important, data that are likely to augment or enhance the creation and restoration of this important freshwater marsh type

Assessment of Growth Response and Patterns of Biomass Allocation by Panicum hemitomon Schultes: Implications for Thick-mat Floating Marsh Creation and Restoration

I carried out several large, manipulative greenhouse and controlled-setting experiments to elucidate Panicum hemitomon growth response as influenced by environmental conditions associated with restoring thick-mat floating marsh. Initially, Panicum hemitomon growth response was assessed in conjunction with manipulated nutrient availability and hydrology. Next, I assessed Panicum hemitomon growth response in conjunction with a suite of substrate and mat or containment materials. Finally, I evaluated Panicum hemitomon growth response, as well as overall created floating marsh vegetated development, using both a multi-species planting approach and a suite of Panicum hemitomon establishment techniques. All partitions of Panicum hemitomon biomass (shoot, rhizome, and root material) were enhanced under nitrogen, and to a lesser extent, phosphorous enrichment. Saturated (not inundated) hydrologic conditions were most conducive for robust growth by all partitions of Panicum hemitomon biomass. Substrate and mat or containment materials had a significant effect on Panicum hemitomon vigor, with peat and peat-containing blended substrate materials being most conducive for vigorous Panicum hemitomon growth. Duralast coconut fiber was the most suitable mat or containment material based not only on measures of plant vigor, but also for reasons associated with strength and stability, as well as buoyancy. The combination of Panicum hemitomon and Ludwigia peploides was superior to any other multi-species treatment tested. Ludwigia peploides was highly resilient to transplanting, grew vigorously in a lateral fashion, produced significantly more biomass than any other secondary species, and enhanced overall mat buoyancy, all key metrics regarding successful floating marsh restoration. Equally as important, the large amount of biomass attained by Ludwigia peploides was not totally at the expense of vigorous Panicum hemitomon growth. With respect to establishment technique, the positive response of Panicum hemitomon rhizome growth to humic acid amendment warrants further study. This research generated data that not only advance the body of general ecological knowledge pertaining to Panicum hemitomon, the dominant macrophyte of thick-mat floating marsh, but equally as important, data that are likely to augment or enhance the creation and restoration of this important freshwater marsh type

A framework for the practical science necessary to restore sustainable, resilient, and biodiverse ecosystems

Demand for restoration of resilient, self-sustaining, and biodiverse natural ecosystems as a conservation measure is increasing globally; however, restoration efforts frequently fail to meet standards appropriate for this objective. Achieving these standards requires management underpinned by input from diverse scientific disciplines including ecology, biotechnology, engineering, soil science, ecophysiology, and genetics. Despite increasing restoration research activity, a gap between the immediate needs of restoration practitioners and the outputs of restoration science often limits the effectiveness of restoration programs. Regrettably, studies often fail to identify the practical issues most critical for restoration success. We propose that part of this oversight may result from the absence of a considered statement of the necessary practical restoration science questions. Here we develop a comprehensive framework of the research required to bridge this gap and guide effective restoration. We structure questions in five themes: (1) setting targets and planning for success, (2) sourcing biological material, (3) optimizing establishment, (4) facilitating growth and survival, and (5) restoring resilience, sustainability, and landscape integration. This framework will assist restoration practitioners and scientists to identify knowledge gaps and develop strategic research focused on applied outcomes. The breadth of questions highlights the importance of cross-discipline collaboration among restoration scientists, and while the program is broad, successful restoration projects have typically invested in many or most of these themes. Achieving restoration ecology's goal of averting biodiversity losses is a vast challenge: investment in appropriate science is urgently needed for ecological restoration to fulfill its potential and meet demand as a conservation too

Author Correction: Drivers of seedling establishment success in dryland restoration efforts

1 Pág. Correción errata.In the version of this Article originally published, the surname of author Tina Parkhurst was incorrectly written as Schroeder. This has now been corrected.Peer reviewe

Note sur le papyrus Amherst II, CLIII

Mayence Fernand. Note sur le papyrus Amherst II, CLIII. In: Bulletin de correspondance hellénique. Volume 29, 1905. pp. 142-144

François Villard, Les vases grecs

Mayence Fernand. François Villard, Les vases grecs. In: L'antiquité classique, Tome 25, fasc. 2, 1956. pp. 553-554

Hansjörg Bloesch. Antike Kunst in der Schweiz. Fünfzig Meisterwerke aus dem klassischen Altertum in öffentlichem und privatem Besitz

Mayence Fernand. Hansjörg Bloesch. Antike Kunst in der Schweiz. Fünfzig Meisterwerke aus dem klassischen Altertum in öffentlichem und privatem Besitz. In: L'antiquité classique, Tome 14, fasc. 2, 1945. pp. 423-425

Le Centenaire de l'École française d'Athènes

Mayence Fernand. Le Centenaire de l'École française d'Athènes. In: L'antiquité classique, Tome 16, fasc. 2, 1947. pp. 345-351