Comment évaluer la biodiversité d'un écosystème ?

On utilise des indices de diversité, des relevés d'espèces et des analyses écologiques.

Quels outils mesurent la biodiversité ?

Des outils comme les systèmes d'information géographique (SIG) et les bases de données biologiques.

Quelles méthodes d'échantillonnage sont utilisées ?

Les méthodes incluent les transects, les quadrats et les pièges à insectes.

Comment identifier une espèce menacée ?

On évalue son statut de conservation via des critères comme la taille de la population.

Quels indicateurs montrent la perte de biodiversité ?

Les indicateurs incluent la diminution des espèces, la dégradation des habitats et l'extinction.

Quels signes indiquent une perte de biodiversité ?

Des signes incluent la raréfaction des espèces, la dégradation des habitats et l'extinction.

Comment la biodiversité affecte-t-elle la santé humaine ?

Une biodiversité réduite peut entraîner des maladies, des allergies et des problèmes nutritionnels.

Quels impacts sur l'agriculture ?

La perte de biodiversité peut réduire la pollinisation et augmenter la vulnérabilité aux ravageurs.

Quels effets sur les écosystèmes aquatiques ?

La perte de biodiversité aquatique entraîne des déséquilibres, affectant la qualité de l'eau.

Quels symptômes d'un écosystème dégradé ?

Des symptômes incluent la pollution, la perte d'habitats et la diminution des espèces.

Comment prévenir la perte de biodiversité ?

On peut prévenir la perte par la protection des habitats, la réduction de la pollution et la gestion durable.

Quel rôle joue l'éducation environnementale ?

L'éducation sensibilise le public aux enjeux de la biodiversité et encourage des comportements responsables.

Comment réduire l'empreinte écologique ?

Réduire l'empreinte par des choix de consommation durables, le recyclage et l'utilisation d'énergies renouvelables.

Quels sont les impacts des espèces invasives ?

Les espèces invasives menacent la biodiversité en perturbant les écosystèmes et en éliminant les espèces locales.

Comment promouvoir l'agriculture durable ?

Promouvoir l'agriculture durable par des pratiques comme la rotation des cultures et l'agroécologie.

Comment restaurer la biodiversité ?

On peut restaurer la biodiversité par la reforestation, la création de réserves et la régénération des habitats.

Quelles politiques soutiennent la biodiversité ?

Des politiques incluent la protection des habitats, les lois sur la conservation et les accords internationaux.

Comment les ONG contribuent-elles ?

Les ONG sensibilisent, financent des projets de conservation et militent pour des politiques durables.

Quels programmes de conservation existent ?

Des programmes incluent les réserves naturelles, les corridors écologiques et les projets de réintroduction.

Comment impliquer les communautés locales ?

Impliquer les communautés par l'éducation, la participation à des projets et le partage des bénéfices.

Quelles sont les conséquences de la perte de biodiversité ?

Les conséquences incluent la dégradation des écosystèmes, la perte de services écosystémiques et des crises alimentaires.

Comment la perte de biodiversité affecte-t-elle le climat ?

La perte de biodiversité peut aggraver le changement climatique en réduisant la résilience des écosystèmes.

Quels risques pour la santé publique ?

La perte de biodiversité peut augmenter les risques de maladies infectieuses et de zoonoses.

Quelles sont les implications économiques ?

Les implications économiques incluent la perte de ressources naturelles et l'impact sur l'agriculture et le tourisme.

Comment la biodiversité influence-t-elle la sécurité alimentaire ?

Une biodiversité riche assure des cultures variées et résilientes, essentielles pour la sécurité alimentaire.

Quels facteurs menacent la biodiversité ?

Les facteurs incluent la destruction des habitats, la pollution, le changement climatique et les espèces invasives.

Quel rôle joue l'urbanisation ?

L'urbanisation entraîne la fragmentation des habitats et la perte d'espaces naturels, menaçant la biodiversité.

Comment l'agriculture intensive impacte-t-elle la biodiversité ?

L'agriculture intensive réduit la diversité des cultures et des habitats, augmentant les risques d'érosion génétique.

Quels effets du changement climatique ?

Le changement climatique modifie les habitats, provoquant des migrations d'espèces et des extinctions.

Comment la pollution affecte-t-elle la biodiversité ?

La pollution de l'air, de l'eau et des sols nuit aux espèces et dégrade les écosystèmes, menaçant la biodiversité.

Biodiversité - Informations médicales vérifiées

Classification of Local Recurrence After Nipple-Sparing Mastectomy Based on Location: The Features of Nipple-Areolar Recurrence Differ from Those of Other Local Recurrences.

Mar 2023

DOI: 10.1245/s10434-022-12760-1 PMID: 36371582

Little information is available about the clinical and pathologic characteristics of local recurrence (LR) after nipple-sparing mastectomy according to the locations of LR.... This study classified 99 patients into the following two groups according to the location of LR after nipple-sparing mastectomy: nipple-areolar recurrence (NAR) group and other locations of LR (oLR) g... For about half of the patients (44.4 %) with NAR, the primary cancer was estrogen receptor (ER)-negative and human epidermal growth factor receptor 2 (HER2)-positive. Conversely, in most of the patien... This multi-institutional retrospective study demonstrated that the features of NAR, such as the characteristics of the primary and recurrent tumors and the prognostic factors after LR resection, were ...

Humans Female Breast Neoplasms Mastectomy Nipples +4 autres

Feasibility of local therapy for recurrent pancreatic cancer.

Sep 2022

DOI: 10.1016/j.pan.2022.05.004 PMID: 35641368

Despite advances in perioperative management, recurrence after curative pancreatectomy is a critical issue in the treatment of pancreatic ductal adenocarcinoma (PDAC). The significance of local therap... We reviewed the medical records of patients with PDAC who underwent curative resection at our institution between January 2009 and December 2019. We examined the patterns of relapse and assessed the c... A total of 246 patients with PDAC who underwent R0 or R1 resection were included in this study. The 3-year overall survival (OS) rate was 39.8%, and the 1-year recurrence-free survival rate was 51.2% ... Our results suggest that a multimodal approach may improve the clinical outcomes of patients with recurrent PDAC....

Adenocarcinoma Carcinoma, Pancreatic Ductal Feasibility Studies Humans Neoplasm Recurrence, Local +6 autres

Ultrasound Assessment of Skin Tumors Local Recurrence.

Oct 2023

DOI: 10.1002/jum.16255 PMID: 37195073

Skin cancer may recur at or around the surgical site despite wide excisions. Prompt clinical and sonographic detection of local recurrence is important since subjects with relapsing melanomas or nonme...

Humans Skin Neoplasms Skin Melanoma Ultrasonography +1 autres

Pathological determinants of outcome following resection of locally advanced or locally recurrent rectal cancer.

Nov 2023

DOI: 10.1016/j.ejso.2023.06.023 PMID: 37442715

Pathological factors that influence and predict survival following pelvic exenteration (PE) for locally advanced (LARC) or locally recurrent rectal cancer (LRRC), especially LRRC, remain poorly unders... A retrospective cohort study was performed for all patients undergoing a curative PE for LARC or LRRC between 2008 and 2021 at a tertiary referral UK specialist colorectal hospital. Cox regression ana... 388 patients were included in the analysis with 256 resections for LARC and 132 for LRRC. 62.4% of patients were male with a median age of 59 years (IQR 49-67). 247 (64%) partial pelvic exenterations ... A positive resection margin and poorly differentiated tumours are significant negative prognostic markers for survival and recurrence in LARC. The results of this study support the need to look for al...

Humans Male Middle Aged Aged Female +7 autres

Intraparenchymal metastases as a cause for local recurrence of pancreatic cancer.

Feb 2023

DOI: 10.1111/his.14839 PMID: 36371607

Using CODA, a technique for three-dimensional reconstruction of large tissues, Kiemen et al. report observation of a microscopic focus of pancreatic cancer found in the vasculature of grossly normal h...

Humans Pancreatic Neoplasms Pancreas Neoplasm Recurrence, Local Pancreatic Neoplasms

Does the Addition of Mutations of CTNNB1 S45F to Clinical Factors Allow Prediction of Local Recurrence in Patients With a Desmoid Tumor? A Local Recurrence Risk Model.

01 10 2023

DOI: 10.1097/CORR.0000000000002627 PMID: 37104792

The initial approach to the treatment of desmoid tumors has changed from surgical resection to watchful waiting. However, surgery is still sometimes considered for some patients, and it is likely that... We sought to explore whether a combined molecular and clinical prognostic model for relapse in patients with desmoid tumors treated with surgery would allow us to identify patients who might do well w... This was a retrospective, single-center study of 107 patients with desmoid tumors who were surgically treated between January 1980 and December 2015, with a median follow-up of 106 months (range 7 to ... The multivariable analysis showed that S45F mutations (hazard ratio 5.25 [95% confidence interval 2.27 to 12.15]; p < 0.001) and tumor in the extremities (HR 3.15 [95% CI 1.35 to 7.33]; p = 0.008) wer... CTNNB1 S45F mutations combined with other clinical variables are a potential prognostic biomarker associated with the risk of relapse in patients with desmoid tumors. The developed nomogram is simple ... Level III, therapeutic study....

Humans Fibromatosis, Aggressive Retrospective Studies Neoplasm Recurrence, Local Mutation +2 autres

Risk Factors of Second Local Recurrence in Surgically Treated Recurrent Brain Metastases: An Exploratory Analysis.

Nov 2022

DOI: 10.1016/j.wneu.2022.08.066 PMID: 36028114

A first local recurrence is common after resection or radiotherapy for brain metastasis (BM). However, patients with BMs can develop multiple local recurrences over time. Published data on second loca... Patients were identified from a database at Brigham and Women's Hospital in Boston. Hazard ratios and 95% confidence intervals for predictors of a second local recurrence were computed using a Cox pro... Of 170 identified surgically treated first locally recurrent lesions, 74 (43.5%) progressed to second locally recurrent lesions at a median of 7 months after craniotomy. Subtotal resection of the firs... A second local recurrence occurred after 43.5% of craniotomies for first recurrent lesions. Subtotal resection and infratentorial location were the strongest risk factors for worse second local recurr...

Humans Female Neoplasm Recurrence, Local Prognosis Risk Factors +3 autres

Applying a neoscore in locally advanced rectal cancer is beneficial in predicting local recurrences after surgery.

2023

DOI: 10.1371/journal.pone.0285709 PMID: 37172066

The current study was undertaken to provide more detailed prognostic models for early prediction of local recurrences and local recurrence free survival (RFS) using different radiologic and pathologic... One hundred patients with locally advanced rectal carcinomas decided to receive neoadjuvant CRT were retrospectively recruited, Hazard ratios (HR) were determined in the two cox regression models and ... HR of 1st group of models: T+N, T+N+G, T+N+G+S, T+N+G+S+PNI, and T+N+G+S+PNI+R were summated and categorized into scores, these scores were significantly correlated with the risk of recurrence (Somer'... We propose that the addition of biologic factors to staging of rectal cancer provide precise stratification and association with local recurrences in patients received preoperative CRT....

Humans Retrospective Studies Prognosis Rectum Rectal Neoplasms +6 autres

Surgery of resectable local recurrence following colorectal cancer: Compartmental surgery improves local control.

Nov 2022

DOI: 10.1002/jso.26990 PMID: 35779039

This study aims to identify prognostic factors and define the best extent of surgery for optimizing treatment of local recurrence (LR) following colorectal cancer (CRC).... An institutional database of consecutive patients who underwent radical resection (R0/R1) of LR following CRC was analyzed prospectively from 2010 to 2021 at one tertiary cancer center.... In this study, 75 patients were included with LR following CRC and analyzed. Patients were categorized as compartmental resections (CompRe) (n = 47) if all adjacent organs were systematically removed,... Complete compartmental surgery is safe and improves local control. Optimal LR resection needs to remove all contiguous organs, with or without tumor involvement....

Colorectal Neoplasms Digestive System Surgical Procedures Humans Neoplasm Recurrence, Local Prognosis +3 autres

Recurrent RET fusions in fibrosarcoma-like neoplasms in adult viscera: expanding the clinicopathological and genetic spectrum.

Mar 2023

DOI: 10.1111/his.14847 PMID: 36443894

RET-fused mesenchymal neoplasms mostly affect the soft tissue of paediatric patients. Given their responsiveness to selective RET inhibitors, it remains critical to identify those extraordinary cases ... Clinicopathological features were assessed and partner agnostic targeted next-generation sequencing on clinically validated platforms were performed. The patients were 18, 53, and 55 years old and inc... Our study expands the clinicopathological and genetic spectrum of mesenchymal neoplasms associated with RET fusions....

Female Humans Male Adult Child +7 autres

Biodiversité : Questions médicales fréquentes

Termes MeSH sélectionnés :

Questions fréquentes et termes MeSH associés

Diagnostic 5

Symptômes 5

Prévention 5

Traitements 5

Complications 5

Facteurs de risque 5

Contenu validé par Dr Olivier Menir

Sous-catégories

Biote

Écotype

Espèce en voie de disparition

Espèce introduite

Microbiote

Microbiome gastro-intestinal

Consortiums microbiens

Mycobiome

Périphyton

Virome

Auteurs principaux

Sources (10000 au total)