A5027488502- Marine Biology and Ecology Research
- Paleontology and Stratigraphy of Fossils
- Soil Carbon and Nitrogen Dynamics
- Cephalopods and Marine Biology
- Marine Biology and Environmental Chemistry
- Geology and Paleoclimatology Research
- Agronomic Practices and Intercropping Systems
- Weed Control and Herbicide Applications
- Ecology and Vegetation Dynamics Studies
- Calcium Carbonate Crystallization and Inhibition
- Legume Nitrogen Fixing Symbiosis
- Seed Germination and Physiology
- Geological and Geochemical Analysis
- Marine Ecology and Invasive Species
- Mycorrhizal Fungi and Plant Interactions
- Marine and environmental studies
- Geological formations and processes
- Forest Ecology and Biodiversity Studies
- Marine Bivalve and Aquaculture Studies
- Aquatic Invertebrate Ecology and Behavior
- Space Exploration and Technology
- Plant nutrient uptake and metabolism
- Protist diversity and phylogeny
- Land Use and Ecosystem Services
- Rangeland and Wildlife Management
The University of Queensland
2018-2024
Agriculture and Food
2018-2024
Equinor (Norway)
2020
University of Minnesota
2016-2018
Central Statistics Office
2018
Stevens Institute of Technology
2018
University of Maryland, College Park
2017-2018
Lund University
2012-2017
Institute of Plant Genetics, Polish Academy of Sciences
2010-2012
University of Canterbury
2010-2012
A new classification of the Brachiopoda is proposed to take into account recent advances in our understanding anatomy, shell morphology, ontogeny and phylogeny phylum. The use phylogenetic analysis help rationalize this information did not obviate dilemma facing all previous classifications how best reconcile fossil living data. Over 95% recognized genera are founded on extinct species, with greatest diversity occurring Cambro-Ordovician times when but two 26 major groups constituting phylum...
Yield stability is fundamental to global food security in the face of climate change, and better strategies are needed for buffering crop yields against increased weather variability. Regional- scale analyses yield can support robust inferences about widely-grown staple crops, but have not been accomplished. We present a novel analytical approach, synthesizing 2000-2014 data on soil factors quantify their impact county-level maize four US states that vary widely these (Illinois, Michigan,...
Summary Agricultural fertilization significantly affects arbuscular mycorrhizal fungal ( AMF ) community composition. However, the functional implications of shifts are unknown, limiting understanding role in agriculture. We assessed composition at four sites managed under same nitrogen (N) and phosphorus (P) fertilizer regimes for 55 yr. also established a glasshouse experiment with soils to investigate –barley Hordeum vulgare nutrient exchange, using carbon 13 C) 33 P isotopic labelling. N...
SUMMARY The most important ordinal classifications of the articulate brachiopods are founded on radical changes skeleton. They all suffer from two serious defects: first a reliance morphogeny only one or features to segregate past and present representatives into ‘natura orders, secondly lack data growth nature living A study shell structure shows that have two‐layered shell, differentiation which is controlled by outer epithelium mantle. Three distinct conditions known: endopunctate with...
Summary The paper is intended primarily as a palaeontological supplement to the stratigraphical studies of Llandovery rocks in type area (O. T. Jones 1925, 1949). systematic revision therefore based on collections obtained from district but material, certain instances, has also been described Meifod and Haverfordwest. Thus basal beds (A x ) are unfossiliferous, whereas equivalent Haverfordwest richly fossiliferous so provide important links between Ordovician brachiopods. Furthermore, some...
The assessment of effects anthropogenic disturbance on biodiversity (BD) and ecosystem services (ES) their relationships are key priorities the Intergovernmental Panel for Biodiversity Ecosystem Services. Agricultural landscapes associated BD provide multiple ES it is crucial to understand how between components change along gradients landscape complexity. In this study, we related eight potentials species richness five invertebrate, vertebrate plant taxonomic groups in cereal farming...
Abstract Root architecture is a promising breeding target for developing resource-efficient crops. Breeders and plant physiologists have called root ideotypes that narrow, deep systems improved water nitrate capture, or wide, shallower better uptake of less mobile topsoil nutrients such as phosphorus. Yet evidence relationships between crop yield limited. Many studies focus on the response to single constraint, despite fact crops are frequently exposed multiple soil constraints. For example,...
Abstract Cover crops can provide a wide range of ecosystem services including soil water conservation, improved nutrient supply and retention, enhanced crop yields. However, achieving these in dryland cropping systems be highly challenging, cover may carry greater risk causing disservices. Assessment the balance vs disservices is critical for understanding potential role within systems. The objective this meta-analysis was to assess effects drylands on mineral nitrogen content at sowing...
Abstract Purpose Selection for root traits has become a target in (pre-)breeding programs aiming at improving crop ability to capture soil resources. However, the benefit of selected heterogeneous environments will depend on spatial and temporal interactions between systems, environment (fertility water supply) management (fertiliser placement). Methods We assessed growth phosphorus acquisition durum wheat ( Triticum L.) lines defined by contrasting seminal angles (41° ‘Narrow’ vs 82°...
Eighty species of living and extinct bryozoans have been studied to ascertain the mode secretion skeleton its structural diversity throughout geological time. In growing tip cheilostomes Membranipora Electra ctenostome Bowerbankia , periostracum secreted by a cap palisade cells expands forwards intussusception. Older periostracum, left behind advancing cell in cyclostomes, becomes seeding sheet calcitic layer (primary layer) vertically disposed crystallites with minor banding, nodules...
Cover crop-based, organic rotational no-till (CCORNT) corn and soybean production is becoming a viable strategy for reducing tillage in annual grain systems the mid-Atlantic, United States. This relies on mechanical termination of cover crops with roller-crimper planting into crop mulches. Here, we report recent research that focuses integrated approaches crop, nutrient pest management CCORNT consider system regional constraints adoption mid-Atlantic. Our suggests roller-crimped cereal rye...
Climate models predict increasing weather variability, with negative consequences for crop production. Conservation agriculture (CA) may enhance climate resilience by generating certain soil improvements. However, the rate at which these improvements accrue is unclear, and some evidence suggests CA can lower yields relative to conventional systems unless all three elements are implemented: reduced tillage, sustained cover, rotational diversity. These cost-benefit issues important...
Abstract Purpose We questioned how root ideotypes selected for deep or shallow architecture function in complex environments with heterogeneous distributions of phosphorus (P), such as many cropping systems north-eastern Australia. Methods used the rhizobox method to evaluate contrasting genotypes durum wheat and sorghum (wide narrow angle) responded combinations starter-P P bands. Results Although we found evidence that angle may influence spatio-temporal exploration bands, (early) plant...
The shell structure of the Lower Cambrian Mickwitzia , a bilaterally symmetrical bivalve hitherto doubtfully assigned to Brachiopoda, confirms that genus shares characters with linguliform brachiopods. columnar lamination its organophosphatic is homologous characterizing acrotretides. shell, however, also pervaded by striated apatitic tubes indistinguishable from those permeating sclerites problematic organophosphatic, laminar–shelled Micrina which close Halkieria . No crown group...
I. ABSTRACT: Research interest in the Highland Border Complex has been pursued sporadically during past 150 years. The results and conclusions have emphasised problems of dealing with a lithologically disparate association which crops out isolated, fault-bounded slivers along line Boundary fault. For much present century, debate centred on whether rocks complex affinities Dalradian Supergroup to N, or are discrete group. Recent fossil discoveries wide variety confirmed that many Ordovician...
Secretion of the exoskeleton Thecidellina barretti proceeds in same way as other living brachiopods, but structure mantle edge is different. Mucin cells occupy core outer lobe, and periostracal secretion begins within a slot separating lobate charged with droplets from long vesicular cells. The former exude an impersistent mucopolysaccharide film may be regarded integral part generative zone; latter secrete most periostracum and, thereafter, carbonate succession they become epithelial layer...
Studies of the ultrastructure exoskeleton Notosaria nigricans (Sowerby), which can be used as standard succession for articulate brachiopods, show that shell secretion involves six distinct operations giving rise to following layers: mucopolysaccharide, outer fibrillar triple-layered membrane, mucoprotein, inner calcareous primary layer and calcareous-organic secondary layer. Comparison with secretory régimes terebratulids like Waltonia inconspicua (Sowerby) suggests only four these are...