Consistent with a warming climate, birds are shifting the timing of their migrations, but it remains unclear to what extent these shifts have kept pace changing environment. Because bird migration is primarily cued by annually consistent physiological responses photoperiod, conditions at breeding grounds depend on variable arrival and climate-driven spring events would diverge. We combined satellite citizen science data estimate rates change in phenological interval between green-up...

Ecological and conservation research has provided a strong scientific underpinning to the modeling of ecosystem services (ESs) over space time, by identifying ecological processes components biodiversity (ecosystem service providers, functional traits) that drive ES supply. Despite this knowledge, efforts map distribution ESs often rely on simple spatial surrogates provide incomplete non-mechanistic representations biophysical variables they are intended proxy. However, alternative data sets...

Climate change is testing the resilience of forests worldwide pushing physiological tolerance to climatic extremes. Plant functional traits have been shown be adapted climate and evolved patterns trait correlations (similar distribution) coordinations (mechanistic trade-off). We predicted that would differentiate between populations associated with gradients, suggestive adaptive variation, correlated adapt future scenarios in similar ways.We measured genetically determined variation...

Abstract Aim Lepidium latifolium (Brassicaceae; perennial pepperweed) is a noxious Eurasian weed invading riparian and wetland areas of the western USA. Understanding which sites are most susceptible to invasion by L. will allow more efficient management this weed. We assessed ability advanced remote sensing techniques develop habitat suitability models for . Location San Francisco Bay/Sacramento‐San Joaquin River Delta, California, Methods distribution was mapped with hyperspectral image...

ABSTRACT Aim Several lines of evidence suggest that beta diversity, or dissimilarity in species composition, should increase with productivity: (1) the latitudinal richness gradient is most closely related to productivity and associated beta‐diversity relationships have been described, (2) scale dependence productivity–diversity relationship implies there be a positive productivity–beta‐diversity relationship. However, such pattern has not yet demonstrated at broad scales. We test if...

(2015). Earth Observation of Ecosystem Services. African Journal Range & Forage Science: Vol. 32, No. 1, pp. 70-71.

Fire increasingly threatens tropical forests in northern Vietnam as climate changes and human population grows. Understanding fire occurrence patterns may support more effective forest management reduce risk. We investigated spatiotemporal drivers of wildfire across three provinces assessed the effectiveness Modified Nesterov index (MNI) danger rating system. explored size within between years types using descriptive analyses developed Maximum Entropy (Maxent) models incorporating variables...

Many invasive species are too widespread to realistically eradicate. For such species, a viable management strategy is slow the rate of spread. However, be effective, this will require detailed spread data and an understanding influence environmental conditions landscape structure on invasion rates. We used time series remotely sensed distribution maps spatial simulation model study Lepidium latifolium (perennial pepperweed) in California's Sacramento‐San Joaquin River Delta. L. noxious weed...

Abstract Invasive aquatic weeds negatively affect biodiversity, fluvial dynamics, water quality, and storage conveyance for a variety of human resource demands. In California's Sacramento–San Joaquin River Delta, one submersed species—Brazilian egeria—and floating species—waterhyacinth—are actively managed to maintain navigable waterways. We monitored the spatial temporal dynamics these species their communities in Sacramento-San Delta using airborne hyperspectral data assessed effect...

Boreal forests maintain regionally important biodiversity and globally ecosystem services, such as carbon storage freshwater resources. Many boreal systems have limited anthropogenic disturbances are preserved, in effect, to date largely by their harsh climates remoteness. As of 2011, almost 10% Canada is subject some manner formal protection, with 4.5% this protected area found within the zone. The management existing parks areas (PPAs) shared amongst many federal, provincial, territorial...

Determining drivers of species richness is recognised as highly complex, involving many synergies and interactions. We examine the utility newly available remote sensing representations vegetation productivity structure to at continental regional scales. related estimates derived from stacked distribution models for birds, mammals, amphibians, reptiles actual potential evapotranspiration (AET PET), forest structure, across Australia a whole well by bioclimatic zones. used structural equation...

Climate change is increasing the risk of drought to forested ecosystems. Although impacts are often anecdotally noted occur in discrete patches high canopy mortality, landscape effects disturbances have received virtually no study. This study characterized configuration impact and investigated relationships between patch characteristics, as indicators intensity, environmental gradients related water availability determine factors influencing vulnerability. Drought were delineated from aerial...

Spatial planning and environmental management are expected to adopt participatory processes. However, the needed spatial data on social values of ecosystem services limited, especially for marine large, remote coastal areas, collection such information can be time resource intensive. Crowdsourcing techniques cost efficient sources data, but must meet needs planners managers with sufficient confidence. We evaluated reliability crowdsourced by assessing agreement between geotagged photos...

Invasive weeds are a serious problem worldwide, threatening biodiversity and damaging economies. Modeling potential distribution of invasive can prioritize locations for monitoring control efforts, increasing management efficiency. Forecasts invasion risk at regional to continental scales enabled by readily available downscaled climate surfaces together with an number digitized georeferenced species occurrence records modeling techniques. However, predictions finer scale in landscapes less...

Perennial pepperweed is an aggressive, exotic weed invading wetland and riparian areas in California, including the San Francisco Bay/Sacramento–San Joaquin Delta Estuary. Effective management will require detailed accurate maps of its distribution. Remote sensing technologies offer capability to map species over broad with rapid return intervals. As a first step assessing potential perennial hyperspectral remote data, this study determined spectral uniqueness relative co-occurring species....

Abstract Aim Temporal variation in environmental conditions merits greater consideration species distribution models (SDMs), and is especially relevant dynamic systems, such as arid semi‐arid environments, where precipitation resource pulses are unpredictable space time. Species responses to this spatio‐temporal include tracking availability with nomadic life histories or reliance on refugia that provide stable, high‐quality habitat. This study evaluated whether inclusion of temporal...

Summary The rne gene of Escherichia coli encodes RNase E, an essential endoribonuclease that is involved in both mRNA decay and rRNA processing. Here we present evidence the transcribed from three promoters: p1, p2 p3. p3 promoters map 34 145 nt upstream previously characterized promoter, generating unusually long 5 ′ UTRs 395 506 respectively. Based on promoter– lacZ transcriptional fusions, p1 a more efficient promoter than either or Low copy number single vectors carrying alone complement...