Macroevolutionary Patterns In The Evolutionary Radiation Of Archosaurs (Tetrapoda: Diapsida)

The rise of archosaurs during the Triassic and Early Jurassic has been treated as a classic example of an evolutionary radiation in the fossil record. This paper reviews published studies and provides new data on archosaur lineage origination, diversity and lineage evolution, morphological disparity, rates of morphological character change, and faunal abundance during the Triassic–Early Jurassic. The fundamental archosaur lineages originated early in the Triassic, in concert with the highest rates of character change. Disparity and diversity peaked later, during the Norian, but the most significant increase in disparity occurred before maximum diversity. Archosaurs were rare components of Early–Middle Triassic faunas, but were more abundant in the Late Triassic and pre-eminent globally by the Early Jurassic. The archosaur radiation was a drawn-out event and major components such as diversity and abundance were discordant from each other. Crurotarsans (crocodile-line archosaurs) were more disparate, diverse, and abundant than avemetatarsalians (bird-line archosaurs, including dinosaurs) during the Late Triassic, but these roles were reversed in the Early Jurassic. There is no strong evidence that dinosaurs outcompeted or gradually eclipsed crurotarsans during the Late Triassic. Instead, crurotarsan diversity decreased precipitously by the end-Triassic extinction, which helped usher in the age of dinosaurian dominance

COTTON LAND TENURE EVALUATION SOFTWARE USERS' GUIDE

The Federal Agriculture Improvement and Reform Act of 1996 (FAIR Act) introduces several significant changes to farm commodity legislation. While these changes impact all program commodities, they have prompted considerable concern for the future of the Texas cotton industry. Changes in the farm program have prompted many landowners and tenants to evaluate their current rental arrangements and determine if changes are required. In response to considerable ensuing questions regarding the land rental market, a Lotus 1-2-3 template was developed to aid parties in determining an equitable lease. This Lotus template allows users to specify enterprise budget information for rice farm operations and then evaluates the expected returns to producers and landowners under various lease scenarios. The landowners' results are compared with the returns from 100% of the market transition payments and user-specified net returns for an alternative enterprise to calculate the net advantage to landowners for producing rice under the budgeted scenario over the life of the FAIR Act. The Cotton Land Tenure Evaluation Users' Guide is a detailed explanation of how to use the Lotus Cotton Land Tenure Evaluation program. This guide instructs users on how to use the various components of the program. Sections of the Users' Guide include a preface, installation instructions, an overview of the changes in the farm program, a section describing how to input data, a description of the custom menu system, and a report section that illustrates examples of the reports that are available for printing.Agricultural and Food Policy,

RICE LAND TENURE EVALUATION SOFTWARE USERS' GUIDE

The Federal Agriculture Improvement and Reform Act of 1996 (FAIR Act) introduces several significant changes to farm commodity legislation. While these changes impact all program commodities, they have prompted considerable concern for the future of the Texas rice industry. Changes in the farm program have prompted many landowners and tenants to evaluate their current rental arrangements and determine if changes are required. In response to considerable ensuing questions regarding the land rental market, a Lotus 1-2-3 template was developed to aid parties in determining an equitable lease. This Lotus template allows users to specify enterprise budget information for rice farm operations and then evaluates the expected returns to producers and landowners under various lease scenarios. The landowners' results are compared with the returns from 100% of the market transition payments and user-specified net returns for an alternative enterprise to calculate the net advantage to landowners for producing rice under the budgeted scenario over the life of the FAIR Act. The Rice Land Tenure Evaluation Users' Guide is a detailed explanation of how to use the Lotus Rice Land Tenure Evaluation program. This guide instructs users on how to use the various components of the program. Sections of the Users' Guide include a preface, installation instructions, an overview of the changes in the farm program, a section describing how to input data, a description of the custom menu system, and a report section that illustrates examples of the reports that are available for printing.Agricultural and Food Policy,

GRAIN LAND TENURE EVALUATION SOFTWARE USERS' GUIDE

The Federal Agriculture Improvement and Reform Act of 1996 (FAIR Act) introduces several significant changes to farm commodity legislation. While these changes impact all program commodities, they have prompted considerable concern for the future of the Texas grain industry. Changes in the farm program have prompted many landowners and tenants to evaluate their current rental arrangements and determine if changes are required. In response to considerable ensuing questions regarding the land rental market, a Lotus 1-2-3 template was developed to aid parties in determining an equitable lease. This Lotus template allows users to specify enterprise budget information for grain farm operations and then evaluates the expected returns to producers and landowners under various lease scenarios. The landowners' results are compared with the returns from 100% of the market transition payments and user-specified net returns for an alternative enterprise to calculate the net advantage to landowners for producing grain under the budgeted scenario over the life of the FAIR Act. The Grain Land Tenure Evaluation Users' Guide is a detailed explanation of how to use the Lotus Grain Land Tenure Evaluation program. This guide instructs users on how to use the various components of the program. Sections of the Users' Guide include a preface, installation instructions, an overview of the changes in the farm program, a section describing how to input data, a description of the custom menu system, and a report section that illustrates examples of the reports that are available for printing. The Grain Land Tenure Evaluation also has the capability of evaluating all seven program crops. A section in the Users' Guide explains how to switch from one crop to another.Agricultural and Food Policy,

Organic farming enhances parasitoid diversity at the local and landscape scales

1. The magnitude of the benefits derived from organic farming within contrasting managed landscapes remains unclear and, in particular, the potential scale-dependent response of insect parasitoids is relatively unexplored. Identifying the scale at which parasitoids are affected by organic farming will be an important step to enhance their conservation. 2. We sampled tachinid parasitoids at the centre and margin of arable and grassland fields on paired organic and conventional farms located in landscapes with different proportions of organic land. A total of 192 fields were sampled in two biogeographical regions of the UK. 3. We found that the positive effect of organic farming on tachinid parasitoid diversity can be observed at multiple spatial scales. At the local scale, we found higher abundance and species richness of tachinid parasitoids on organic than on conventional farms and on field margins than on field centres. At the landscape scale, the diversity of tachinids was higher in landscapes with higher proportions of organic land. At both scales, the positive effect of organic farming was clear for arable fields, while it was almost neutral for grasslands. 4. Synthesis and applications. Any attempt to enhance parasitoid diversity in agricultural landscapes needs to consider the local management in relation to the habitat type, location within the field and agricultural management in the surrounding landscape. To restore parasitoid diversity, the promotion of organic agriculture should aim to increase both the total extent of organic farming and the connectivity of individual farms. As the benefits of organic farming to biodiversity clearly spread beyond individual farm boundaries, any assessment of organic farming should consider these positive externalities

The Low Redshift survey at Calar Alto (LoRCA)

The Baryon Acoustic Oscillation (BAO) feature in the power spectrum of galaxies provides a standard ruler to measure the accelerated expansion of the Universe. To extract all available information about dark energy, it is necessary to measure a standard ruler in the local, z<0.2, universe where dark energy dominates most the energy density of the Universe. Though the volume available in the local universe is limited, it is just big enough to measure accurately the long 100 Mpc/h wave-mode of the BAO. Using cosmological N-body simulations and approximate methods based on Lagrangian perturbation theory, we construct a suite of a thousand light-cones to evaluate the precision at which one can measure the BAO standard ruler in the local universe. We find that using the most massive galaxies on the full sky (34,000 sq. deg.), i.e. a K(2MASS)<14 magnitude-limited sample, one can measure the BAO scale up to a precision of 4\% and 1.2\% using reconstruction). We also find that such a survey would help to detect the dynamics of dark energy.Therefore, we propose a 3-year long observational project, named the Low Redshift survey at Calar Alto (LoRCA), to observe spectroscopically about 200,000 galaxies in the northern sky to contribute to the construction of aforementioned galaxy sample. The suite of light-cones is made available to the public.Comment: 15 pages. Accepted in MNRAS. Please visit our website: http://lorca-survey.ft.uam.es

The Low Redshift survey at Calar Alto (LoRCA)

The Baryon Acoustic Oscillation (BAO) feature in the power spectrum of galaxies provides a standard ruler to measure the accelerated expansion of the Universe. To extract all available information about dark energy, it is necessary to measure a standard ruler in the local, z<0.2, universe where dark energy dominates most the energy density of the Universe. Though the volume available in the local universe is limited, it is just big enough to measure accurately the long 100 Mpc/h wave-mode of the BAO. Using cosmological N-body simulations and approximate methods based on Lagrangian perturbation theory, we construct a suite of a thousand light-cones to evaluate the precision at which one can measure the BAO standard ruler in the local universe. We find that using the most massive galaxies on the full sky (34,000 sq. deg.), i.e. a K(2MASS)<14 magnitude-limited sample, one can measure the BAO scale up to a precision of 4\% and 1.2\% using reconstruction). We also find that such a survey would help to detect the dynamics of dark energy.Therefore, we propose a 3-year long observational project, named the Low Redshift survey at Calar Alto (LoRCA), to observe spectroscopically about 200,000 galaxies in the northern sky to contribute to the construction of aforementioned galaxy sample. The suite of light-cones is made available to the public.Comment: 15 pages. Accepted in MNRAS. Please visit our website: http://lorca-survey.ft.uam.es

A new approach to generating research-quality data through citizen science: The USA National Phenology Monitoring System

Phenology is one of the most sensitive biological responses to climate change, and recent changes in phenology have the potential to shake up ecosystems. In some cases, it appears they already are. Thus, for ecological reasons it is critical that we improve our understanding of species&#x2019; phenologies and how these phenologies are responding to recent, rapid climate change. Phenological events like flowering and bird migrations are easy to observe, culturally important, and, at a fundamental level, naturally inspire human curiosity&#x2014; thus providing an excellent opportunity to engage citizen scientists. The USA National Phenology Network has recently initiated a national effort to encourage people at different levels of expertise&#x2014;from backyard naturalists to professional scientists&#x2014;to observe phenological events and contribute to a national database that will be used to greatly improve our understanding of spatio-temporal variation in phenology and associated phenological responses to climate change.&#xd;&#xa;&#xd;&#xa;Traditional phenological observation protocols identify specific dates at which individual phenological events are observed. The scientific usefulness of long-term phenological observations could be improved with a more carefully structured protocol. At the USA-NPN we have developed a new approach that directs observers to record each day that they observe an individual plant, and to assess and report the state of specific life stages (or phenophases) as occurring or not occurring on that plant for each observation date. Evaluation is phrased in terms of simple, easy-to-understand, questions (e.g. &#x201c;Do you see open flowers?&#x201d;), which makes it very appropriate for a citizen science audience. From this method, a rich dataset of phenological metrics can be extracted, including the duration of a phenophase (e.g. open flowers), the beginning and end points of a phenophase (e.g. traditional phenological events such as first flower and last flower), multiple distinct occurrences of phenophases within a single growing season (e.g multiple flowering events, common in drought-prone regions), as well as quantification of sampling frequency and observational uncertainties. These features greatly enhance the utility of the resulting data for statistical analyses addressing questions such as how phenological events vary in time and space, and in response to global change. This new protocol is an important step forward, and its widespread adoption will increase the scientific value of data collected by citizen scientists.&#xd;&#xa