Performance Implications of Firm Resource Interactions in the Acquisition of R&D-Intensive Firms

We explore the role of resource interactions in explaining firm performance in the context of acquisitions. Although we confirm that acquisitions do not lead to higher performance on average, we do find that complementary resource profiles in target and acquiring firms are associated with abnormal returns. Specifically, we find that acquiring firm marketing resources and target firm technology resources positively reinforce (complement) each other; meanwhile, acquiring and target firm technology resources negatively reinforce (substitute) one another. Implications for management theory and practice are identified

Spatial and temporal patterns in Holocene wildfire responses to environmental change in the northern extratropics

Fire is an important environmental process in the northern extratropics (NET), with various regions predicted to experience the highest magnitude increases in fire activity compared to other global regions in future. Previous NET palaeofire studies are limited by poor data availability and a lack of quantitative methods. A synthesis of charcoal records is conducted to reconstruct sub-continentalscale Holocene fire histories across the NET (>45°N) and to understand their environmental controls. A circum-NET-scale analysis, and a more spatially resolved analysis at the European scale (n of 21 regions) are conducted. At the NET scale, simulated palaeo climate and plant productivity data are used in a novel clustering method to define a stratification that delineates spatial units of coherent fire-relevant environmental change. At the European scale, this is done using pollen-based reconstructions of Holocene forest cover, summer temperature and precipitation change. Fire histories are reconstructed by aggregating charcoal records from the Reading Palaeofire Database within clusters. Fire reconstructions are correlated with climate and land cover reconstructions at 4000-year intervals. Fire responses of 20 regions show correlation values of >= |0.75| with at least one environmental variable for at least one 4000-year interval. Across Europe, fire increased over the Holocene, initially in response to the Fennoscandian Ice Sheet collapse and associated climate drying and forestation. Mid-to-late Holocene fire increases were caused by forest compositional shifts, human deforestation, and agricultural expansion. Across North America, the early-Holocene collapse of the Laurentide Ice Sheet caused continent-wide productivity increases leading to fire increases. A subsequent long-term moisture increase drove late-Holocene fire declines across most of the continent. In central Asia, a general Holocene-wide moisture increase drove a long-term fire decline. The results support previous study showing that sub-continental palaeofire histories in the NET are explained by variations in climate variables influencing fuel moisture and load, but that these effects can be modulated by land cover processes influencing fuel structure and composition. The results provide a basis for spatial prediction of fire regime changes in response to future climate, vegetation and human land use processes

Gastropods alien to South Africa cause severe environmental harm in their global alien ranges across habitats

CITATION: Kesner, D. & Kumschick, S. 2018. Gastropods alien to South Africa cause severe environmental harm in their global alien ranges across habitats. Ecology and Evolution, 8(16):8273-8285, doi:10.1002/ece3.4385.The original publication is available at https://onlinelibrary.wiley.comAlien gastropods have caused extensive harm to biodiversity and socioeconomic systems like agriculture and horticulture worldwide. For conservation and management purposes, information on impacts needs to be easily interpretable and comparable, and the factors that determine impacts understood. This study aimed to assess gastropods alien to South Africa to compare impact severity between species and understand how they vary between habitats and mechanisms. Furthermore, we explore the relationship between environmental and socioeconomic impacts, and both impact measures with life‐history traits. We used the Environmental Impact Classification for Alien Taxa (EICAT) and Socio‐Economic Impact Classification for Alien Taxa (SEICAT) to assess impacts of 34 gastropods alien to South Africa including evidence of impact from their entire alien range. We tested for correlations between environmental and socioeconomic impacts per species, and with fecundity and native latitude range using Kendall's tau tests. Kruskal–Wallis tests were used to compare impact magnitude among mechanisms and habitats, respectively. This study presents the first application of EICAT and SEICAT for invertebrates. There was no correlation between environmental impacts and socioeconomic impacts. Habitats did not differ regarding the severity of impacts recorded, but impacts via disease transmission were lower than other mechanisms. Neither fecundity nor native range latitude was correlated with impact magnitude. Despite gastropods being agricultural and horticultural pests globally, resilience of socioeconomic systems makes high impacts uncommon. Environmental systems may be vulnerable to gastropod impacts across habitats, having experienced multiple local extinctions of wetland island snail fauna. South Africa stands out as the only continental country that follows this trend. The knowledge gained on severity and nature of gastropod impacts is useful in risk assessment, which can aid conservation management. To make impact assessments more realistic, we suggest alternative ways of reporting impacts classified under EICAT and SEICAT.South African National Department of Environmental AffairsNational Research FoundationDST-NRF Centre of Excellence for Invasion BiologySouth African National Biodiversity Institutehttps://onlinelibrary.wiley.com/doi/full/10.1002/ece3.4385Publisher's versio

Assessment of Potential Augmentation and Management Strategies for Razorback Sucker \u3cem\u3eXyrauchen texanus\u3c/em\u3e in Lake Mead and Grand Canyon: A 2021 Science Panel Summary

Razorback Sucker Xyrauchen texanus is a large-bodied, long-lived species endemic to the Colorado River Basin. This species historically ranged throughout the basin from the Colorado River delta in Mexico to Wyoming and Colorado. Currently, the species persists ,in a small portion of its historical range with the help of intensive management efforts including augmentation. Recruitment to adult life stages is extremely limited in the wild, but is documented consistently in Lake Mead. Research and monitoring efforts in Lake Mead are ongoing since 1996 and have recently expanded to include the Colorado River inflow area and portions of lower Grand Canyon. Despite evidence of recruitment, the current population size in Lake Mead and Grand Canyon is believed to be small (data) and susceptible to stochastic effects. This raised interest in the potential to augment the population to prevent loss of genetic diversity and increase abundance and distribution in general, as well as explore recruitment bottlenecks. To address critical uncertainties surrounding this management option and to brainstorm other potential options, a Planning Committee and Steering Committee made up of representatives of state (Arizona, Nevada), tribal (Hualapai Tribe, Navajo Nation), and federal (Bureau of Reclamation, National Park Service, and U.S. Fish and Wildlife Service) management agencies convened an Expert Science Panel (ESP; 2021), to consider augmentation and management strategies for Razorback Sucker in Lake Mead and Grand Canyon. The purpose of this report is to summarize those findings

Association Between Biomarkers of Ovarian Reserve and Infertility Among Older Women of Reproductive Age

Despite lack of evidence of their utility, biomarkers of ovarian reserve are being promoted as potential markers of reproductive potential or “fertility tests.

Shareholder activism in the UK: types of activists, forms of activism, and their impact on a target’s performance

Considering the recent rapid expansion of shareholder activism phenomenon in the United Kingdom (UK) and the vast amount of resources committed to it by corporations, government and investors, its effectiveness has become a crucial subject for investigation. This article analyzes organizational outcomes of shareholder activism in the UK. This research is based on a unique comprehensive database of shareholder activism events during the period of 1998–2008. We provide a detailed account of different types of activists, activism strategies and shareholder demands associated with the events of activism. Our findings show that the effectiveness of shareholder activism in terms of abnormal stock-market returns varies dramatically depending on its form, type of investor and the nature of investor proposals

Blueprints of Effective Biodiversity and Conservation Knowledge Products That Support Marine Policy

Biodiversity and conservation data are generally costly to collect, particularly in the marine realm. Hence, data collected for a given—often scientific—purpose are occasionally contributed toward secondary needs, such as policy implementation or other types of decision-making. However, while the quality and accessibility of marine biodiversity and conservation data have improved over the past decade, the ways in which these data can be used to develop and implement relevant management and conservation measures and actions are not always explicit. For this reason, there are a number of scientifically-sound datasets that are not used systematically to inform policy and decisions. Transforming these marine biodiversity and conservation datasets into knowledge products that convey the information required by policy- and decision-makers is an important step in strengthening knowledge exchange across the science-policy interface. Here, we identify seven characteristics of a selection of online biodiversity and conservation knowledge products that contribute to their ability to support policy- and decision-making in the marine realm (as measured by e.g., mentions in policy resolutions/decisions, or use for reporting under selected policy instruments; use in high-level screening for areas of biodiversity importance). These characteristics include: a clear policy mandate; established networks of collaborators; iterative co-design of a user-friendly interface; standardized, comprehensive and documented methods with quality assurance; consistent capacity and succession planning; accessible data and value-added products that are fit-for-purpose; and metrics of use collated and reported. The outcomes of this review are intended to: (a) support data creators/owners/providers in designing and curating biodiversity and conservation knowledge products that have greater influence, and hence impact, in policy- and decision-making, and (b) provide recommendations for how decision- and policy-makers can support the development, implementation, and sustainability of robust biodiversity and conservation knowledge products through the framing of marine policy and decision-making frameworks.This is a contribution to the “Building the European Biodiversity Observation Network” (EU BON) project (www.eubon.eu), a 7th Framework Programme funded by the European Union under grant agreement No. 308454. The authors would also like to acknowledge the Proteus Partnership, the European Commission, the CITES Secretariat, UN Environment, the World Conservation Monitoring Centre, the International Union for Conservation of Nature and the national agencies contributing to GBIF core funds for their financial contributions toward developing and maintaining these knowledge products

The Reading Palaeofire Database : an expanded global resource to document changes in fire regimes from sedimentary charcoal records

Sedimentary charcoal records are widely used to reconstruct regional changes in fire regimes through time in the geological past. Existing global compilations are not geographically comprehensive and do not provide consistent metadata for all sites. Furthermore, the age models provided for these records are not harmonised and many are based on older calibrations of the radiocarbon ages. These issues limit the use of existing compilations for research into past fire regimes. Here, we present an expanded database of charcoal records, accompanied by new age models based on recalibration of radiocarbon ages using IntCal20 and Bayesian age-modelling software. We document the structure and contents of the database, the construction of the age models, and the quality control measures applied. We also record the expansion of geographical coverage relative to previous charcoal compilations and the expansion of metadata that can be used to inform analyses. This first version of the Reading Palaeofire Database contains 1676 records (entities) from 1480 sites worldwide. The database (RPDv1b - Harrison et al., 2021) is available at https://doi.org/10.17864/1947.000345.Peer reviewe