@article {157,
	title = {Annual precipitation regulates spatial and temporal drivers of lake water clarity},
	journal = {Ecological Applications},
	volume = {27},
	year = {2017},
	pages = {632 - 643},
	abstract = {Understanding how and why lakes vary and respond to different drivers through time and space is needed to understand, predict, and manage freshwater quality in an era of rapidly changing land use and climate. Water clarity regulates many characteristics of aquatic ecosystems and is responsive to watershed features, making it a sentinel of environmental change. However, whether precipitation alters the relative importance of features that influence lake water clarity or the spatial scales at which they operate is unknown. We used a dataset of thousands of north temperate lakes and asked: (1) How does water clarity differ between a very wet versus dry year? (2) Does the relative importance of different watershed features, or the spatial extent at which they are measured, vary between wet and dry years? (3) What lake and watershed characteristics regulate long-term water clarity trends? Among lakes, water clarity was reduced and less variable in the wet year than in the dry year; furthermore, water clarity was reduced much more in high-clarity lakes during the wet year than in low-clarity lakes. Climate, land use/land cover, and lake morphometry explained most variance in clarity among lakes in both years, but the spatial scales at which some features were important differed between the dry and wet years. Watershed percent agriculture was most important in the dry year, whereas riparian zone percent agriculture (around each lake and upstream features) was most important in the wet year. Between 1991 and 2012, water clarity declined in 23\% of lakes and increased in only 6\% of lakes. Conductance influenced the direction of temporal trend (clarity declined in lakes with low conductance), whereas the proportion of watershed wetlands, catchment-to-lake-area ratio, and lake maximum depth interacted with antecedent precipitation. Many predictors of water clarity, such as lake depth and landscape position, are features that cannot be readily managed. Given trends of increasing precipitation, eliminating riparian zone agriculture or keeping it <10\% of area may be an effective option to maintain or improve water clarity.},
	keywords = {land use, land-water interactions, landscape ecology, precipitation, remote sensing, Water quality},
	isbn = {1939-5582},
	doi = {10.1002/eap.1471},
	url = {http://dx.doi.org/10.1002/eap.1471},
	author = {Rose, Kevin C and Greb, Steven R. and Diebel, Matthew and Turner, Monica G.}
}
@article {164,
	title = {The Influence of Legacy P on Lake Water Quality in a Midwestern Agricultural Watershed},
	journal = {Ecosystems},
	year = {2017},
	month = {2017//},
	pages = {1 - 15},
	abstract = {Decades of fertilizer and manure applications have led to a buildup of phosphorus (P) in agricultural soils and sediments, commonly referred to as legacy P. Legacy P can provide a long-term source of P to surface waters where it causes eutrophication. Using a suite of numerical models, we investigated the influence of legacy P on water quality in the Yahara Watershed of southern Wisconsin, USA. The suite included Agro-IBIS, a terrestrial ecosystem model; THMB, a hydrologic and nutrient routing model; and the Yahara Water Quality Model which estimates water quality indicators in the Yahara chain of lakes. Using five alternative scenarios of antecedent P storage (legacy P) in soils and channels under historical climate conditions, we simulated outcomes of P yield from the landscape, lake P loading, and three lake water quality indicators. Legacy P had a significant effect on lake loads and water quality. Across the five scenarios for Lake Mendota, the largest and most upstream lake, average P yield (kg~ha-1) varied by -41 to +22\%, P load (kg~y-1) by -35 to +14\%, summer total P (TP) concentration (mg~l-1) by -25 to +12\%, Secchi depth (m) by -7 to +3\%, and the probability of hypereutrophy by -67 to +34\%, relative to baseline conditions. The minimum storage scenario showed that a 35\% reduction in present-day loads to Lake Mendota corresponded with a 25\% reduction in summer TP and smaller reductions in the downstream lakes. Water quality was more vulnerable to heavy rainfall events at higher amounts of P storage and less so at lower amounts. Increases in heavy precipitation are expected with climate change; therefore, water quality could be protected by decreasing P reserves.},
	isbn = {1435-0629},
	doi = {10.1007/s10021-017-0125-0},
	url = {http://dx.doi.org/10.1007/s10021-017-0125-0},
	author = {Motew, Melissa and Chen, Xi and Booth, Eric G. and Carpenter, Stephen R. and Pinkas, Pavel and Zipper, Samuel C. and Loheide, Steven P. and Donner, Simon D. and Tsuruta, Kai and Vadas, Peter A. and Kucharik, Christopher J.}
}
@article {131,
	title = {Nitrogen Fertilization Effects on Productivity and Nitrogen Loss in Three Grass-Based Perennial Bioenergy Cropping Systems},
	journal = {PLoS ONE},
	volume = {11},
	year = {2016},
	month = {2016/03/18},
	pages = {e0151919 - },
	abstract = {<p>Nitrogen (N) fertilization can greatly improve plant productivity but needs to be carefully managed to avoid harmful environmental impacts. Nutrient management guidelines aimed at reducing harmful forms of N loss such as nitrous oxide (N<sub>2</sub>O) emissions and nitrate (NO<sub>3</sub><sup>-</sup>) leaching have been tailored for many cropping systems. The developing bioenergy industry is likely to make use of novel cropping systems, such as polycultures of perennial species, for which we have limited nutrient management experience. We studied how a switchgrass (<italic>Panicum virgatum</italic>) monoculture, a 5-species native grass mixture and an 18-species restored prairie responded to annual fertilizer applications of 56 kg N ha<sup>-1</sup> in a field-scale agronomic trial in south-central Wisconsin over a 2-year period. We observed greater fertilizer-induced N<sub>2</sub>O emissions and sub-rooting zone NO<sub>3</sub><sup>-</sup> concentrations in the switchgrass monoculture than in either polyculture. Fertilization increased aboveground net primary productivity in the polycultures, but not in the switchgrass monoculture. Switchgrass was generally more productive, while the two polycultures did not differ from each other in productivity or N loss. Our results highlight differences between polycultures and a switchgrass monoculture in responding to N fertilization.</p>},
	url = {http://dx.doi.org/10.1371\%2Fjournal.pone.0151919},
	author = {Duran, Brianna E. L. and Duncan, David S. and Oates, Lawrence G. and Kucharik, Christopher J. and Jackson, Randall D.}
}
@article {95,
	title = {Planetary boundaries: Guiding human development on a changing planet},
	journal = {Science},
	volume = {347},
	year = {2015},
	month = {2015/02/13},
	abstract = {The planetary boundaries framework defines a safe operating space for humanity based on the intrinsic biophysical processes that regulate the stability of the Earth system. Here, we revise and update the planetary boundary framework, with a focus on the underpinning biophysical science, based on targeted input from expert research communities and on more general scientific advances over the past 5 years. Several of the boundaries now have a two-tier approach, reflecting the importance of cross-scale interactions and the regional-level heterogeneity of the processes that underpin the boundaries. Two core boundaries{\textemdash}climate change and biosphere integrity{\textemdash}have been identified, each of which has the potential on its own to drive the Earth system into a new state should they be substantially and persistently transgressed.},
	doi = {10.1126/science.1259855},
	url = {http://www.sciencemag.org/content/347/6223/1259855.abstract},
	author = {Steffen, Will and Richardson, Katherine and Rockstr{\"o}m, Johan and Cornell, Sarah E. and Fetzer, Ingo and Bennett, Elena M. and Biggs, Reinette and Carpenter, Stephen R. and de Vries, Wim and de Wit, Cynthia A. and Folke, Carl and Gerten, Dieter and Heinke, Jens and Mace, Georgina M. and Persson, Linn M. and Ramanathan, Veerabhadran and Reyers, Belinda and S{\"o}rlin, Sverker}
}
@article {68,
	title = {General Resilience to Cope with Extreme Events},
	journal = {Sustainability},
	volume = {4},
	year = {2012},
	pages = {3248-3259},
	abstract = {Resilience to specified kinds of disasters is an active area of research and practice. However, rare or unprecedented disturbances that are unusually intense or extensive require a more broad-spectrum type of resilience. General resilience is the capacity of social-ecological systems to adapt or transform in response to unfamiliar, unexpected and extreme shocks. Conditions that enable general resilience include diversity, modularity, openness, reserves, feedbacks, nestedness, monitoring, leadership, and trust. Processes for building general resilience are an emerging and crucially important area of research.},
	isbn = {2071-1050},
	doi = {10.3390/su4123248},
	url = {http://dx.doi.org/10.3390/su4123248},
	author = {Carpenter, S. R. and Arrow, K. J. and Barrett, S. and Biggs, R. and Brock, W. A. and Crepin, A. S. and Engstrom, G. and Folke, C. and Hughes, T. P. and Kautsky, N. and Li, C. Z. and McCarney, G. and Meng, K. and Maler, K. G. and Polasky, S. and Scheffer, M. and Shogren, J. and Sterner, T. and Vincent, J. R. and Walker, B. and Xepapadeas, A. and de Zeeuw, A.}
}
