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Book ; Online ; E-Book: The ecology of plant litter decomposition in stream ecosystems

Swan, Christopher M. / Boyero, Luz / Canhoto, Cristina

2021

Author's details	Christopher M. Swan, Luz Boyero, Cristina Canhoto, editors
Keywords	Aquatic ecology ; Ecosystems ; Plant ecology ; Biodiversity
Subject code	577.6 ; 577.7
Language	English
Size	1 Online-Ressource (IX, 524 Seiten)
Publisher	Springer International Publishing
Publishing place	Cham
Publishing country	Switzerland
Document type	Book ; Online ; E-Book
Remark	Zugriff für angemeldete ZB MED-Nutzerinnen und -Nutzer
HBZ-ID	HT021060090
ISBN	978-3-030-72854-0 ; 9783030728533 ; 9783030728557 ; 9783030728564 ; 3-030-72854-4 ; 3030728536 ; 3030728552 ; 3030728560
Database	ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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Article ; Online: Hydrological contraction patterns and duration of drying period shape microbial-mediated litter decomposition.

Simões, S / Canhoto, C / Bärlocher, F / Gonçalves, A L

The Science of the total environment

2021 Volume 785, Page(s) 147312

Abstract: The length and number of streams experiencing intermittency is expected to increase in response to human population growth, associated water use, and climate change. In these streams, habitat contraction may occur at distinct rates giving rise to drying ... ...

Abstract	The length and number of streams experiencing intermittency is expected to increase in response to human population growth, associated water use, and climate change. In these streams, habitat contraction may occur at distinct rates giving rise to drying periods of distinct duration. To date, the impact of drought installation rate and duration have been mostly overlooked. In this microcosm study, stream conditioned oak leaf litter was subjected to either a short (5 weeks) or a long (8 weeks) drying period, originating from a very slow, slow, or abrupt contraction. The effects of these treatments were compared at the end of the drying period in terms of microbial-mediated litter mass loss, fungal biomass, respiration, and sporulation rates. A very slow contraction pattern led to 1.3 times higher mass loss than both slow or abrupt contraction. Fungal biomass, respiration and sporulation rates were up to 2.3 times lower under slow than abrupt contraction. Both drying period durations inhibited leaf decomposition, suggesting an early, critical effect of drying on microbial-mediated processing, regardless of contraction pattern. This seems to be related to an impoverishment of leaf associated fungal communities and resultant lower functional efficacy - species richness decreased by up to 75% in response to a long (vs. short) drying period, despite the maintenance of mycelial biomass. Our results show the relevance of aquatic hyphomycetes to litter decomposition in dry streambeds, particularly following slower habitat contraction patterns. Faster wet-to-dry transitions and longer drying periods strongly impaired microbial functioning, with potential impacts on global processing rates and cascading effects through changes of detritus quality. If confirmed in field tests, such impacts on stream functioning may be mitigated by preserving riparian forests, which may protect against extreme drying events by buffering temperature changes.
MeSH term(s)	Biomass ; Ecosystem ; Forests ; Fungi ; Humans ; Plant Leaves ; Rivers
Language	English
Publishing date	2021-04-24
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2021.147312
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Article ; Online: Air temperature more than drought duration affects litter decomposition under flow intermittency.

Simões, Sara / Gonçalves, Ana Lúcia / Jones, T Hefin / Sousa, José Paulo / Canhoto, Cristina

The Science of the total environment

2022 Volume 829, Page(s) 154666

Abstract: Stream intermittency - periodic sequences of water flow cessation and resumption - occurs throughout the year, across seasons. Even though temperature is a known regulator of litter decomposition in both terrestrial and aquatic environments, comparative ... ...

Abstract	Stream intermittency - periodic sequences of water flow cessation and resumption - occurs throughout the year, across seasons. Even though temperature is a known regulator of litter decomposition in both terrestrial and aquatic environments, comparative experiments on drought durations at distinct temperatures on microbial-mediated decomposition in streams experiencing intermittency are still lacking. Here, three drought temperatures (5, 15 and 25 °C) and two durations (short: 2.5 weeks; long: 5 weeks) were applied in a microcosm study to oak leaf discs colonized in a reference stream; mass loss and associated microbial parameters (fungal biomass, microbial activity, and sporulation rates) were evaluated following re-submersion for 2 weeks. Higher mass loss was found at 15 °C than 25 °C. A prolongation of the drought exposure period had no effect on mass loss, suggesting an early (≤ 2.5 weeks) inhibitor effect of drought on microbial-mediated leaf degradation. Fungal biomass was highest at 25 °C following a short drought, and decreased with a longer drought period at both 15 °C and 25 °C. Microbial activity was not affected by either drought duration or temperature. Sporulation rates and fungal diversity were significantly reduced by the longer drought period; in the short treatment, maximum values were found at 15 °C. In contrast to longer droughts, aquatic fungal communities during short dry periods seem to invest in energetically-expensive physiological responses to desiccation (e.g., ergosterol production) promoting biomass accrual at the expense of mass loss and reproductive output. Under more severe desiccation (higher duration and temperature), the lower diversity of fungal communities seem to result in negative legacy effects for fungal growth and reproductive capacity after flow resumption. These results suggest that native riparian vegetation, through its ability to regulate temperature in streams, may be critical in protecting freshwaters from intensified severity of drought periods in streams experiencing intermittency.
MeSH term(s)	Biomass ; Droughts ; Ecosystem ; Fungi/metabolism ; Plant Leaves/metabolism ; Temperature
Language	English
Publishing date	2022-03-18
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2022.154666
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Article ; Online: Predicting Peritoneal Carcinomatosis in Locally Advanced Gastric Cancer: The Significance of Tumor Markers in the Peritoneal Washing.

Pinheiro, João Luís / Duarte, Liliana / Santos, Andreia J / Tojal, André / Canhoto, Carolina / Ferreira, Marta / Marques, Conceição / Pereira, Jorge

Journal of gastrointestinal cancer

2023

Abstract: Purpose: Gastric cancer is the fifth most common malignant tumor worldwide. Many attempts have been made over the years to investigate the relationship between tumor markers and the risk of recurrence. This study aims to explore the predictive value of ... ...

Abstract	Purpose: Gastric cancer is the fifth most common malignant tumor worldwide. Many attempts have been made over the years to investigate the relationship between tumor markers and the risk of recurrence. This study aims to explore the predictive value of tumor markers measured in peritoneal washing during staging laparoscopy, regarding peritoneal carcinomatosis and mortality within 1 year. Methods: Patients with locally advanced gastric cancer, staged as at least usT2anyNM0 were submitted to staging laparoscopy in a Portuguese single center. CA 19.9, CEA, CA 125, and CA 72.4 were measured in the peritoneal washing after being harvested during staging laparoscopy. Results: Thirty-eight patients were enrolled. After 1 year, 20 patients did not recur (52.5%), 11 (28.9%) developed carcinomatosis, and 7 (18.4%) had distant metastasis. Mortality reached 23.7% (n = 9). A statistically significant prediction of carcinomatosis was obtained for CA 125 (cutoff: 107.6 U/mL (p = 0.019)) and CEA (cutoff: 2.0 ng/mL (p = 0.020)) with 87.5% and 75% sensitivity, respectively. Prediction of mortality was significant for CA 125 (cutoff: 103.8 U/mL (p = 0.044)) and CA 125 + CEA (p = 0.030). CEA and CA 125 had NPVs of 87.9% and 93.1% regarding PC, respectively. NPVs of 88.9% and 89.2% were met concerning mortality, for the same tumor markers. Conclusion: Performing the peritoneal liquid harvest during staging laparoscopy makes this analysis cost effective, reproducible, and does not add further morbidity. CA 125 and CEA, individually and in association, are good predictors of progression of disease and mortality within a year of staging laparoscopy in GC patients.
Language	English
Publishing date	2023-11-15
Publishing country	United States
Document type	Journal Article
ZDB-ID	2452514-5
ISSN	1941-6636 ; 1559-0739 ; 1941-6628 ; 1537-3649
ISSN (online)	1941-6636 ; 1559-0739
ISSN	1941-6628 ; 1537-3649
DOI	10.1007/s12029-023-00984-7
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Article ; Online: Pneumoperitoneum from acute gastric dilation and perforation.

Azevedo, Fernando / Canhoto, Carolina / Costa, Beatriz / Carvalho, Hélder

BMJ case reports

2019 Volume 12, Issue 11

MeSH term(s)	Acute Disease ; Female ; Gastrectomy ; Gastric Dilatation/complications ; Humans ; Middle Aged ; Pneumoperitoneum/etiology ; Pneumoperitoneum/surgery
Language	English
Publishing date	2019-11-19
Publishing country	England
Document type	Case Reports ; Journal Article
ISSN	1757-790X
ISSN (online)	1757-790X
DOI	10.1136/bcr-2019-232392
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Article: Hydrological contraction patterns and duration of drying period shape microbial-mediated litter decomposition

Simões, S / Canhoto, C / Bärlocher, F / Gonçalves, A.L

Science of the total environment. 2021 Sept. 01, v. 785

2021

Abstract	The length and number of streams experiencing intermittency is expected to increase in response to human population growth, associated water use, and climate change. In these streams, habitat contraction may occur at distinct rates giving rise to drying periods of distinct duration. To date, the impact of drought installation rate and duration have been mostly overlooked. In this microcosm study, stream conditioned oak leaf litter was subjected to either a short (5 weeks) or a long (8 weeks) drying period, originating from a very slow, slow, or abrupt contraction. The effects of these treatments were compared at the end of the drying period in terms of microbial-mediated litter mass loss, fungal biomass, respiration, and sporulation rates. A very slow contraction pattern led to 1.3 times higher mass loss than both slow or abrupt contraction. Fungal biomass, respiration and sporulation rates were up to 2.3 times lower under slow than abrupt contraction. Both drying period durations inhibited leaf decomposition, suggesting an early, critical effect of drying on microbial-mediated processing, regardless of contraction pattern. This seems to be related to an impoverishment of leaf associated fungal communities and resultant lower functional efficacy – species richness decreased by up to 75% in response to a long (vs. short) drying period, despite the maintenance of mycelial biomass. Our results show the relevance of aquatic hyphomycetes to litter decomposition in dry streambeds, particularly following slower habitat contraction patterns. Faster wet-to-dry transitions and longer drying periods strongly impaired microbial functioning, with potential impacts on global processing rates and cascading effects through changes of detritus quality. If confirmed in field tests, such impacts on stream functioning may be mitigated by preserving riparian forests, which may protect against extreme drying events by buffering temperature changes.
Keywords	climate change ; detritus ; drought ; environment ; fungal biomass ; fungi ; habitats ; human population ; hydrology ; leaves ; mycelium ; plant litter ; population growth ; species richness ; sporulation ; stream channels ; temperature
Language	English
Dates of publication	2021-0901
Publishing place	Elsevier B.V.
Document type	Article
Note	NAL-AP-2-clean
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2021.147312
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Management of afferent loop syndrome after Roux-en-Y subtotal gastrectomy and choledocolithiasis with recurrent cholangitis.

Azevedo, Fernando / Canhoto, Carolina / Tralhão, José Guilherme / Carvalho, Hélder

BMJ case reports

2020 Volume 13, Issue 1

Abstract: Afferent loop syndrome is a rare complication after gastrectomy with Billroth II or Roux-en-Y reconstruction, caused by an obstruction in the proximal loop. The biliary stasis and bacterial overgrowth secondary to this obstruction can lead to repeated ... ...

Abstract	Afferent loop syndrome is a rare complication after gastrectomy with Billroth II or Roux-en-Y reconstruction, caused by an obstruction in the proximal loop. The biliary stasis and bacterial overgrowth secondary to this obstruction can lead to repeated episodes of acute cholangitis. We present the case of a male patient who had previously undergone gastrectomy with Roux-en-Y reconstruction and later experienced multiple episodes of acute cholangitis secondary to choledocolithiasis. He underwent an open exploration of the bile ducts with choledocolitotomy, but the events of cholangitis persisted. Further investigation permitted to identify a dilation of the biliary loop of the Roux-en-Y anastomosis, suggesting enterobiliary reflux as the cause of recurrent acute cholangitis. Therefore, a bowel enterectomy and new jejunojejunostomy were undertaken, and normal biliary flow was re-established. The surgical treatment is mandatory in benign causes, leading to the resolution of the obstruction and subsequent normalisation of bile flow.
MeSH term(s)	Afferent Loop Syndrome/diagnostic imaging ; Afferent Loop Syndrome/etiology ; Afferent Loop Syndrome/surgery ; Anastomosis, Roux-en-Y/adverse effects ; Cholangitis/diagnostic imaging ; Cholangitis/surgery ; Gastrectomy/adverse effects ; Humans ; Magnetic Resonance Imaging ; Male ; Middle Aged ; Postoperative Complications/surgery ; Tomography, X-Ray Computed
Language	English
Publishing date	2020-01-05
Publishing country	England
Document type	Case Reports ; Journal Article
ISSN	1757-790X
ISSN (online)	1757-790X
DOI	10.1136/bcr-2019-232498
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Salt pulses effects on in-stream litter processing and recovery capacity depend on substrata quality.

Oliveira, Ricardo / Martínez, Aingeru / Gonçalves, Ana Lúcia / Almeida Júnior, Edivan S / Canhoto, Cristina

The Science of the total environment

2021 Volume 783, Page(s) 147013

Abstract: Human activities have greatly extended and intensified freshwater salinization, which threatens the structure and functioning of streams and rivers. Research on salt effects on in-stream processes has been strongly biased towards chronic salinization at ... ...

Abstract	Human activities have greatly extended and intensified freshwater salinization, which threatens the structure and functioning of streams and rivers. Research on salt effects on in-stream processes has been strongly biased towards chronic salinization at constant levels. The aim of this study was to assess microbial mediated decomposition of two leaf species contrasting in quality (alder and oak) and associated descriptors, during salt-pulsed contamination (salinization period) and after cessation of salt additions (recovery period). Leaves were incubated in a mountain stream (central Portugal) longitudinally divided over 22 m. Half of the stream (salinized half) was subjected to daily short-term sharp salinity increases (conductivity up to ~48 mS cm
MeSH term(s)	Alnus ; Fungi ; Humans ; Plant Leaves ; Portugal ; Rivers ; Salinity
Language	English
Publishing date	2021-04-10
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2021.147013
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Article: Surgical treatment of giant gist with acute gastrointestinal bleeding: Case report.

Melo, Catarina / Canhoto, Carolina / Manata, Fernando / Bernardes, António

International journal of surgery case reports

2018 Volume 53, Page(s) 354–357

Abstract: Introduction: Gastrointestinal stromal tumors represent about 1% of the tumors of digestive tract. Their presentation consists often of indolent symptoms. However, they can present as surgical emergencies in rare cases. This work presents a case of a ... ...

Abstract	Introduction: Gastrointestinal stromal tumors represent about 1% of the tumors of digestive tract. Their presentation consists often of indolent symptoms. However, they can present as surgical emergencies in rare cases. This work presents a case of a giant jejunal GIST that required emergent surgical treatment. Case presentation: A 60-year-old male presented with abdominal pain and acute low gastrointestinal bleeding. During observation a palpable mass was detected in the periumbilical region, left hypochondrium and left flank. A non-total colonoscopy was inconclusive. An Angio-CT showed a large exophytic tumor arising from the 4 Conclusions: This case pretends to review an unusual presentation of a giant jejunal intestinal GISTs as well as its management in an emergent context.
Language	English
Publishing date	2018-11-16
Publishing country	Netherlands
Document type	Journal Article
ISSN	2210-2612
ISSN	2210-2612
DOI	10.1016/j.ijscr.2018.11.021
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Article ; Online: Leaf litter microbial decomposition in salinized streams under intermittency.

Gonçalves, Ana Lúcia / Simões, Sara / Bärlocher, Felix / Canhoto, Cristina

The Science of the total environment

2018 Volume 653, Page(s) 1204–1212

Abstract: Human-induced salinization of freshwaters constitutes a growing global problem, whose consequences on streams functioning are largely unknown. Climate change projections predict enhanced evaporation, as well as an increase in extreme events and in ... ...

Abstract	Human-induced salinization of freshwaters constitutes a growing global problem, whose consequences on streams functioning are largely unknown. Climate change projections predict enhanced evaporation, as well as an increase in extreme events and in variability of precipitation. This will result in more frequent, extended and severe drought periods that may aggravate water salinization of streams and rivers. In this study we conducted a microcosm experiment to assess the combined effects of three drought regimes - abrupt (AD), slow (SD) and very slow transition to dryness (VSD) - and three levels of salinization (0, 4, 6 g L
MeSH term(s)	Ecosystem ; Plant Leaves/metabolism ; Plant Leaves/microbiology ; Quercus/metabolism ; Quercus/microbiology ; Rivers/chemistry ; Rivers/microbiology ; Salinity ; Stress, Physiological
Language	English
Publishing date	2018-11-06
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2018.11.050
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