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43 result(s) for "Carlson, Nathaniel"
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Ecological consequences of large herbivore exclusion in an African savanna
Diverse communities of large mammalian herbivores (LMH), once widespread, are now rare. LMH exert strong direct and indirect effects on community structure and ecosystem functions, and measuring these effects is important for testing ecological theory and for understanding past, current, and future environmental change. This in turn requires long-termexperimental manipulations, owing to the slow and often nonlinear responses of populations and assemblages to LMH removal. Moreover, the effects of particular species or body-size classes within diverse LMH guilds are difficult to pinpoint, and the magnitude and even direction of these effects often depends on environmental context. Since 2008, we have maintained the Ungulate Herbivory Under Rainfall Uncertainty (UHURU) experiment, a series of size-selective LMH exclosures replicated across a rainfall/productivity gradient in a semiarid Kenyan savanna. The goals of the UHURU experiment are to measure the effects of removing successively smaller size classes of LMH (mimicking the process of size-biased extirpation) and to establish how these effects are shaped by spatial and temporal variation in rainfall. The UHURU experiment comprises three LMH-exclusion treatments and an unfenced control, applied to nine randomized blocks of contiguous 1-ha plots (n = 36). The fenced treatments are MEGA (exclusion of megaherbivores, elephant and giraffe), MESO (exclusion of herbivores ≥40 kg), and TOTAL (exclusion of herbivores ≥5 kg). Each block is replicated three times at three sites across the 20-km rainfall gradient, which has fluctuated over the course of the experiment. The first 5 years of data were published previously (Ecological Archives E095-064) and have been used in numerous studies. Since that publication, we have (1) continued to collect data following the original protocols, (2) improved the taxonomic resolution and accuracy of plant and small-mammal identifications, and (3) begun collecting several new data sets. Here, we present updated and extended raw data from the first 12 years of the UHURU experiment (2008–2019). Data include daily rainfall data throughout the experiment; annual surveys of understory plant communities; annual censuses of woody-plant communities; annual measurements of individually tagged woody plants; monthly monitoring of flowering and fruiting phenology; every-other-month small-mammal mark–recapture data; and quarterly largemammal dung surveys. There are no copyright restrictions; notification of when and how data are used is appreciated and users of UHURU data should cite this data paper when using the data.
Ecological consequences of large herbivore exclusion in an African savanna: 12years of data from the UHURU experiment
Diverse communities of large mammalian herbivores (LMH), once widespread, are now rare. LMH exert strong direct and indirect effects on community structure and ecosystem functions, and measuring these effects is important for testing ecological theory and for understanding past, current, and future environmental change. This in turn requires long‐term experimental manipulations, owing to the slow and often nonlinear responses of populations and assemblages to LMH removal. Moreover, the effects of particular species or body‐size classes within diverse LMH guilds are difficult to pinpoint, and the magnitude and even direction of these effects often depends on environmental context. Since 2008, we have maintained the Ungulate Herbivory Under Rainfall Uncertainty (UHURU) experiment, a series of size‐selective LMH exclosures replicated across a rainfall/productivity gradient in a semiarid Kenyan savanna. The goals of the UHURU experiment are to measure the effects of removing successively smaller size classes of LMH (mimicking the process of size‐biased extirpation) and to establish how these effects are shaped by spatial and temporal variation in rainfall. The UHURU experiment comprises three LMH‐exclusion treatments and an unfenced control, applied to nine randomized blocks of contiguous 1‐ha plots (n = 36). The fenced treatments are MEGA (exclusion of megaherbivores, elephant and giraffe), MESO (exclusion of herbivores ≥40 kg), and TOTAL (exclusion of herbivores ≥5 kg). Each block is replicated three times at three sites across the 20‐km rainfall gradient, which has fluctuated over the course of the experiment. The first 5 years of data were published previously (Ecological Archives E095‐064) and have been used in numerous studies. Since that publication, we have (1) continued to collect data following the original protocols, (2) improved the taxonomic resolution and accuracy of plant and small‐mammal identifications, and (3) begun collecting several new data sets. Here, we present updated and extended raw data from the first 12 years of the UHURU experiment (2008–2019). Data include daily rainfall data throughout the experiment; annual surveys of understory plant communities; annual censuses of woody‐plant communities; annual measurements of individually tagged woody plants; monthly monitoring of flowering and fruiting phenology; every‐other‐month small‐mammal mark–recapture data; and quarterly large‐mammal dung surveys. There are no copyright restrictions; notification of when and how data are used is appreciated and users of UHURU data should cite this data paper when using the data.
Ecological consequences of large herbivore exclusion in an A frican savanna: 12 years of data from the UHURU experiment
Diverse communities of large mammalian herbivores (LMH), once widespread, are now rare. LMH exert strong direct and indirect effects on community structure and ecosystem functions, and measuring these effects is important for testing ecological theory and for understanding past, current, and future environmental change. This in turn requires long‐term experimental manipulations, owing to the slow and often nonlinear responses of populations and assemblages to LMH removal. Moreover, the effects of particular species or body‐size classes within diverse LMH guilds are difficult to pinpoint, and the magnitude and even direction of these effects often depends on environmental context. Since 2008, we have maintained the Ungulate Herbivory Under Rainfall Uncertainty (UHURU) experiment, a series of size‐selective LMH exclosures replicated across a rainfall/productivity gradient in a semiarid Kenyan savanna. The goals of the UHURU experiment are to measure the effects of removing successively smaller size classes of LMH (mimicking the process of size‐biased extirpation) and to establish how these effects are shaped by spatial and temporal variation in rainfall. The UHURU experiment comprises three LMH‐exclusion treatments and an unfenced control, applied to nine randomized blocks of contiguous 1‐ha plots ( n  = 36). The fenced treatments are MEGA (exclusion of megaherbivores, elephant and giraffe), MESO (exclusion of herbivores ≥40 kg), and TOTAL (exclusion of herbivores ≥5 kg). Each block is replicated three times at three sites across the 20‐km rainfall gradient, which has fluctuated over the course of the experiment. The first 5 years of data were published previously ( Ecological Archives E095‐064) and have been used in numerous studies. Since that publication, we have (1) continued to collect data following the original protocols, (2) improved the taxonomic resolution and accuracy of plant and small‐mammal identifications, and (3) begun collecting several new data sets. Here, we present updated and extended raw data from the first 12 years of the UHURU experiment (2008–2019). Data include daily rainfall data throughout the experiment; annual surveys of understory plant communities; annual censuses of woody‐plant communities; annual measurements of individually tagged woody plants; monthly monitoring of flowering and fruiting phenology; every‐other‐month small‐mammal mark–recapture data; and quarterly large‐mammal dung surveys. There are no copyright restrictions; notification of when and how data are used is appreciated and users of UHURU data should cite this data paper when using the data.
Lost at Sea: A Reappraisal of Ridley Scott’s 1492: Conquest of Paradise
Some have regarded this equivocation on the historical content and refraining from coming down in obvious overt judgment upon Columbus, as suggestive of a failure of nerve on Scott’s part, a terminal indecisiveness. The protracted sequence of hoisting up the central town church bell in the new island community has often been singled out for disdain but its triumphalist tone are crucial because the very idea of that triumph is what that scene is about. [...]it must be said that the film features one of the greatest endings in all of cinema.
Trade Publication Article
Pilgrim of the World: on Liliana Cavani’s Francesco
Rourke captures astonishingly well the subtle drift of a man whose life was intended for military service as he is gradually affected, even infected, by an incremental awareness which eventually motivates him to overturn his entire life, and, by consequence, that of many others. [...]much of what Rourke does here registers as impressive because of the commitment he and Cavani make to keeping things subdued and simply observing moments of experience that will always remain impenetrable. The cut which has been longest in circulation in the US is defaced by an edit job that makes the film virtually incoherent in contrast to the grace of that long version but somehow its glories shine through and in certain respects are actually enhanced (the mysterious made that much more so —here it works and the already fragmented vignette structure helps prevent it all from complete collapse).
Trade Publication Article
Gebo and the Shadow (O Gebo e a Sombra)
Oliveira plays with formal elements like framing, for instance, turning the spartan courtyard/living room of the family home into an overt set for subdued theatrical spectacle. [...]loyalty and charity too exist as modes of conceived ethical conduct which are available and can be applied in combinations but not without the real risk of a compromise in idealized standards. Complications arise continually within these pure, idealized conceptions (to take just one, Doroteia’s view of her son’s actions: positioning them as an understandable, even admirable reaction against the resignation to poverty; representing them as a noble ambition). The extreme nature of Gebo’s final moral stand, affected even as it is by complicating counter currents, makes the point that the purity of this as abstract representation far exceeds the specific manifestation of the idea.
Trade Publication Article
Three Films by Sokurov and Their Literary Progenitors
The new Cinema Guild DVD/Blu-Ray box set includes three such films and allows us access into Sokurov’s unique style of literary adaptation, one which might more accurately be labelled an interaction. [...]that aspect becomes the prominent characteristic. [...]at the end of the film, there is a different kind of re-emergence, this one along the same corporeal plane as these figures leave the frozen history of the museum and venture outside. Though the film draws on the established atmosphere and worldview perspective of “Russian writers of the 19th century” it is Dostoevsky’s Crime and Punishment, with its unique emphasis on moral questioning, which emerges as the most directly influential model.
Trade Publication Article
Inquietude
[...]it really must be that titular disquiet, an existential unease or angst. Disquiet or anxiety is a product of neuroses–the fixation on immortality as necessity is product of a heightened sense of self-importance and a narcissistic, limited view, one crippled by a lack of irony. More than ever in Oliveira’s cinema there is an emphasis on the artifacts of that civilized society, the art it produces as representative of its established cultural definitions and attitudes. Part of the point of including this third story would seem to be to force a reconciliation to that notion; that the idea of the elemental is poetic by nature and that this was the presiding mode of meaning making and comprehension at a particular point in time.
Trade Publication Article
PWESuite: Phonetic Word Embeddings and Tasks They Facilitate
Mapping words into a fixed-dimensional vector space is the backbone of modern NLP. While most word embedding methods successfully encode semantic information, they overlook phonetic information that is crucial for many tasks. We develop three methods that use articulatory features to build phonetically informed word embeddings. To address the inconsistent evaluation of existing phonetic word embedding methods, we also contribute a task suite to fairly evaluate past, current, and future methods. We evaluate both (1) intrinsic aspects of phonetic word embeddings, such as word retrieval and correlation with sound similarity, and (2) extrinsic performance on tasks such as rhyme and cognate detection and sound analogies. We hope our task suite will promote reproducibility and inspire future phonetic embedding research.
A Tale of Two Cultures: Comparing Interpersonal Information Disclosure Norms on Twitter
We present an exploration of cultural norms surrounding online disclosure of information about one's interpersonal relationships (such as information about family members, colleagues, friends, or lovers) on Twitter. The literature identifies the cultural dimension of individualism versus collectivism as being a major determinant of offline communication differences in terms of emotion, topic, and content disclosed. We decided to study whether such differences also occur online in context of Twitter when comparing tweets posted in an individualistic (U.S.) versus a collectivist (India) society. We collected more than 2 million tweets posted in the U.S. and India over a 3 month period which contain interpersonal relationship keywords. A card-sort study was used to develop this culturally-sensitive saturated taxonomy of keywords that represent interpersonal relationships (e.g., ma, mom, mother). Then we developed a high-accuracy interpersonal disclosure detector based on dependency-parsing (F1-score: 86%) to identify when the words refer to a personal relationship of the poster (e.g., \"my mom\" as opposed to \"a mom\"). This allowed us to identify the 400K+ tweets in our data set which actually disclose information about the poster's interpersonal relationships. We used a mixed methods approach to analyze these tweets (e.g., comparing the amount of joy expressed about one's family) and found differences in emotion, topic, and content disclosed between tweets from the U.S. versus India. Our analysis also reveals how a combination of qualitative and quantitative methods are needed to uncover these differences; Using just one or the other can be misleading. This study extends the prior literature on Multi-Party Privacy and provides guidance for researchers and designers of culturally-sensitive systems.