Publications

@article{Vadeboncoeur2021b,

title = {Blue Waters, Green Bottoms: Benthic Filamentous Algal Blooms (FABs) are an Emerging Threat to Clear Lakes Worldwide},

author = {Y Vadeboncoeur and MV Moore and SD Stewart and S Chandra and KS Atkins and JS Baron and K Bouma-Gregson and S Brothers and SN Francoeur and L Genzoli and SN Higgins and S Hilt and LR Katona and D Kelly and IA Oleksy and T Ozersky and ME Power and D Roberts and AP Smits and O Timoshkin and F Tromboni and MJ Vander Zanden and EA Volkova and AS Waters and SA Wood and M Yamamuro},

url = {https://angelo.berkeley.edu/vadebonceour_algal_blooms/},

doi = {https://doi.org/10.1093/biosci/biab049},

year  = {2021},

date = {2021-07-27},

urldate = {2021-07-27},

journal = {BioScience},

volume = {71},

keywords = {algal blooms, benthic, ERCZO, lakes},

pubstate = {published},

tppubtype = {article}

}

@article{Hood2021,

title = {Longitudinal patterns and linkages in benthic fine particulate organic matter composition, respiration, and nutrient uptake},

author = {James M. Hood and Lyndsie M. Collis and John D. Schade and Rebecca A. Stark and Jacques C. Finlay},

url = {https://aslopubs.onlinelibrary.wiley.com/doi/10.1002/lno.11781},

doi = {10.1002/lno.11781},

year  = {2021},

date = {2021-05-01},

journal = {Limnology and Oceanography},

abstract = {Longitudinal changes in the structure and function of river ecosystems have long been recognized, yet our understanding of how such patterns shape elemental cycles remains limited. In particular, while benthic fine particulate organic matter (POM, 0.7–1000 μm) may control many stream nutrient cycles, less is known about longitudinal patterns or controls of benthic POM‐associated nutrient uptake. We conducted a survey of benthic POM‐associated respiration and nutrient uptake as well as microbial biomass (bacteria and algae) and benthic POM composition in four size classes (0.7–53 μm, 53–106 μm, 106–250 μm, and 250–1000 μm) in six streams in the forested South Fork Eel River watershed (California), encompassing a longitudinal gradient in light availability and primary production. Benthic POM at downstream sites was composed of smaller particles with lower organic matter content that were richer in nitrogen and autotrophic material. Areal respiration and nutrient uptake rates increased 11‐ to 67‐fold with stream size. While microbial activity rates did not increase with stream size, benthic POM‐associated microbial biomass increased 20‐fold with stream size, and closely tracked a 15‐fold increase in light availability, and primary production. Thus, microbial biomass, not activity, determined longitudinal patterns in benthic POM‐associated areal nutrient uptake and respiration rates. We attribute longitudinal patterns in microbial biomass to increases in light availability and primary production. Our findings help clarify the role of local (primary production) and upstream processes in shaping ecosystem structure and function.},

keywords = {benthic, fine particulate organic matter, microbial biomass, Nutrient Cycling, Stream Ecology},

pubstate = {published},

tppubtype = {article}

}

@article{Bouma-Gregson2021,

title = {Taxon-specific photosynthetic responses of attached algal assemblages to experimental translocation between river habitats},

author = {Keith Bouma-Gregson and Mary E. Power and Paula C. Furey and Casey J. Huckins and Yvonne Vadeboncoeur},

url = {https://www.journals.uchicago.edu/doi/pdf/10.1086/713095},

doi = {10.1086/713095},

year  = {2021},

date = {2021-02-25},

journal = {Freshwater Science},

volume = {40},

number = {1},

abstract = {Attached algal and cyanobacterial taxa differ in their ability to exploit and tolerate the diversity of flow, irradiance, and temperature regimes typical of a heterogeneous riverscape. Understanding the drivers of the small-scale variation in algal taxonomic composition helps us predict the riverscape-scale effects of altered flow regimes, but microhabitat-scale variation in algal taxonomy complicates the interpretation of ecosystem-scale estimates of biomass or primary production. Using pulse-amplitude modulated (PAM) fluorometry, we performed 2 manipulative field experiments (in 2014 and 2015) to measure photosynthetic responses of algae and cyanobacteria to depth, temperature, and flow modifications. In 2014, we exposed 6 attached algal assemblages common to the South Fork Eel River (California, USA) to a 24-h incubation on either the river bottom (20 cm deep) or floating at the water surface. In 2015, we incubated 3 algal assemblages for 1 wk in either the thalweg or at the river’s edge. For PAM measurements, we developed a novel method (Photosynthesis–Irradiance Periphyton Experimental System [PIPES]) for manipulating attached filamentous algae, a morphology common in aquatic habitats but underrepresented in photosynthesis experiments. To make the PIPES, we sandwiched thin (<1 mm) layers of filamentous attached algae between 2 layers of mesh so that the algae could be isolated and manipulated for repeated PAM measurements. In the 2014 experiment, incubating Cladophora, Rivularia, Microcoleus, and Anabaena at the water surface tended to decrease photosynthetic rates relative to submerged controls, whereas for Nostoc, the photosynthetic rates were higher in floating treatments. In the 2015 experiment, Cladophora and Oedogonium incubated in the warmer, low-flow river margin had persistently lower photosynthesis rates than their counterparts incubated in the thalweg. The PIPES method improves our ability to make PAM measurements on attached algae. PIPES can be used in conjunction with other methods to evaluate taxon-specific responses to environmental conditions and to help us predict how algal assemblages will shift in dominance under different river management regimes.},

keywords = {algae, benthic, Cladophora, cyanobacteria, electron transport rate, flow, Microcoleus, microhabitat, PAM, photosynthesis, temperature},

pubstate = {published},

tppubtype = {article}

}

@article{Howard2006,

title = {The functional role of native freshwater mussels in the fluvial benthic environment},

author = {J. K. Howard and K. M. Cuffey},

url = {https://angelo.berkeley.edu/wp-content/uploads/sites/59/Howard_2006_FreshBio.pdf},

doi = {10.1111/j.1365-2427.2005.01507.x},

year  = {2006},

date = {2006-02-10},

journal = {Freshwater Biology},

volume = {51},

number = {3},

pages = {460-474},

abstract = {1. Freshwater mussels are the dominant consumer biomass in many fluvial systems. As filter feeding grazers, mussels can remove large amounts of particulate matter from the water column and transfer these resources to the substrate as biodeposits (agglutinated mussel faeces and pseudofaeces). Mussel biodeposits are a nutrient rich and easily assimilated food source and therefore may have significant relevance to benthic community structure. This study examines the functional role of Margaritifera falcata in the South Fork Eel River, California. 

2. We addressed two main questions: (i) Do mussels increase benthic resources in this system? (ii) If so, does this alter macroinvertebrate community structure? 

3. Measurements and enclosure experiments in the South Fork Eel River show that mussels can play a significant role in local food webs by increasing available fine particulate matter (both organic and inorganic) on the substrate. We document increased benthic macroinvertebrate biomass for predators and collectors (Leptophlebidae) in the presence of mussels, but only in late summer.},

keywords = {benthic, biodeposit, California, fluvial, food web, freshwater mussels, functional role, trophic},

pubstate = {published},

tppubtype = {article}

}